## Step 1: Define the optimization problem
The problem is to minimize the given objective function subject to various constraints. The objective function and constraints involve variables representing milligrams of vitamin B1, milligrams of zinc, milligrams of vitamin B7, grams of carbohydrates, milligrams of potassium, and milligrams of vitamin B4.

## Step 2: Identify the variables and their attributes
Let $x_1$ be the milligrams of vitamin B1, $x_2$ be the milligrams of zinc, $x_3$ be the milligrams of vitamin B7, $x_4$ be the grams of carbohydrates, $x_5$ be the milligrams of potassium, and $x_6$ be the milligrams of vitamin B4.

## 3: Formulate the objective function
The objective function to minimize is:
\[ 1x_1^2 + 8x_1x_2 + 6x_1x_4 + 2x_2^2 + 4x_2x_3 + 3x_2x_4 + 3x_3^2 + 3x_3x_4 + 4x_4^2 + 7x_4x_5 + 9x_5^2 + 3x_6^2 + 4x_1 + 8x_3 + 2x_4 + 3x_5 \]

## 4: Define the constraints
The constraints are:
- $5x_1 \leq 62$
- $1x_2 \leq 62$
- $3x_3 \leq 62$
- $5x_4 \leq 62$
- $5x_5 \leq 62$
- $8x_6 \leq 62$
- $5x_1 + 3x_3 \geq 6$
- $5x_1 + 8x_6 \geq 7$
- $5^2x_5^2 + 8^2x_6^2 \geq 9$
- $3x_3 + 5x_4 \geq 10$
- $1x_2 + 5x_4 \geq 5$
- $3x_3 + 5x_5 \geq 9$
- $1x_2^2 + 3x_3^2 + 8x_6^2 \geq 10$
- $3x_3 + 5x_5 + 8x_6 \geq 10$
- $1x_2 + 3x_3 + 5x_5 \geq 10$
- $5x_1 + 1x_2 + 3x_3 \geq 10$
- $3x_3 + 5x_4 + 8x_6 \geq 10$
- $5x_1 + 1x_2 + 5x_5 \geq 10$
- $1x_2 + 5x_4 + 8x_6 \geq 10$
- $1x_2^2 + 3x_3^2 + 5x_4^2 \geq 10$
- $1x_2^2 + 3x_3^2 + 8x_6^2 \geq 10$
- $3x_3 + 5x_5 + 8x_6 \geq 10$
- $1x_2^2 + 3x_3^2 + 5x_5^2 \geq 10$
- $1x_1^2 + 1x_2^2 + 3x_3^2 \geq 10$
- $3x_3^2 + 5x_4^2 + 8x_6^2 \geq 10$
- $5x_1 + 1x_2 + 5x_5 \geq 10$
- $1x_2 + 5x_4 + 8x_6 \geq 10$
- $3x_3 + 5x_4 + 5x_5 \geq 10$
- $1x_2 + 3x_3 + 8x_6 \geq 10$
- $1x_2^2 + 3x_3^2 + 5x_5^2 \geq 10$
- $5x_1 + 1x_2 + 3x_3 \geq 10$
- $3x_3 + 5x_4 + 8x_6 \geq 10$
- $5x_1 + 1x_2 + 5x_5 \geq 10$
- $1x_2^2 + 5x_4^2 + 8x_6^2 \geq 10$
- $3x_3^2 + 5x_4^2 + 5x_5^2 \geq 10$
- $1x_2 + 3x_3 + 8x_6 \geq 10$
- $3x_3^2 + 5x_5^2 + 8x_6^2 \geq 10$
- $1x_2^2 + 3x_3^2 + 5x_5^2 \geq 10$
- $-3x_2^2 + 9x_5^2 \geq 0$
- $-1x_4^2 + 6x_5^2 \geq 0$
- $8x_3 - 5x_4 \geq 0$
- $3x_3 + 5x_4 \leq 20$
- $1x_2 + 3x_3 \leq 17$
- $5x_4 + 8x_6 \leq 57$
- $3x_3^2 + 5x_5^2 \leq 52$
- $3x_3 + 8x_6 \leq 59$
- $1x_2 + 8x_6 \leq 13$
- $5x_1 + 5x_5 \leq 57$
- $1x_1^2 + 1x_2^2 + 8x_6^2 \leq 13$
- $5x_1 + 1x_2 + 5x_5 \leq 15$

## 5: Implement the problem in Gurobi
```python
import gurobi

def optimize():
    model = gurobi.Model()

    # Define variables
    x1 = model.addVar(lb=-gurobi.GRB.INFINITY, ub=gurobi.GRB.INFINITY, name="x1")  # milligrams of vitamin B1
    x2 = model.addVar(lb=0, ub=gurobi.GRB.INFINITY, name="x2", vtype=gurobi.GRB.INTEGER)  # milligrams of zinc
    x3 = model.addVar(lb=0, ub=gurobi.GRB.INFINITY, name="x3", vtype=gurobi.GRB.INTEGER)  # milligrams of vitamin B7
    x4 = model.addVar(lb=0, ub=gurobi.GRB.INFINITY, name="x4", vtype=gurobi.GRB.INTEGER)  # grams of carbohydrates
    x5 = model.addVar(lb=0, ub=gurobi.GRB.INFINITY, name="x5", vtype=gurobi.GRB.INTEGER)  # milligrams of potassium
    x6 = model.addVar(lb=0, ub=gurobi.GRB.INFINITY, name="x6", vtype=gurobi.GRB.INTEGER)  # milligrams of vitamin B4

    # Objective function
    model.setObjective(1*x1**2 + 8*x1*x2 + 6*x1*x4 + 2*x2**2 + 4*x2*x3 + 3*x2*x4 + 3*x3**2 + 3*x3*x4 + 4*x4**2 + 7*x4*x5 + 9*x5**2 + 3*x6**2 + 4*x1 + 8*x3 + 2*x4 + 3*x5)

    # Constraints
    model.addConstr(5 * x1 <= 62)
    model.addConstr(1 * x2 <= 62)
    model.addConstr(3 * x3 <= 62)
    model.addConstr(5 * x4 <= 62)
    model.addConstr(5 * x5 <= 62)
    model.addConstr(8 * x6 <= 62)
    model.addConstr(5 * x1 + 3 * x3 >= 6)
    model.addConstr(5 * x1 + 8 * x6 >= 7)
    model.addConstr(25 * x5**2 + 64 * x6**2 >= 9)
    model.addConstr(3 * x3 + 5 * x4 >= 10)
    model.addConstr(x2 + 5 * x4 >= 5)
    model.addConstr(3 * x3 + 5 * x5 >= 9)
    model.addConstr(x2**2 + 9 * x3**2 + 64 * x6**2 >= 10)
    model.addConstr(3 * x3 + 5 * x5 + 8 * x6 >= 10)
    model.addConstr(x2 + 3 * x3 + 5 * x5 >= 10)
    model.addConstr(5 * x1 + x2 + 3 * x3 >= 10)
    model.addConstr(3 * x3 + 5 * x4 + 8 * x6 >= 10)
    model.addConstr(5 * x1 + x2 + 5 * x5 >= 10)
    model.addConstr(x2 + 5 * x4 + 8 * x6 >= 10)
    model.addConstr(x2**2 + 9 * x3**2 + 25 * x4**2 >= 10)
    model.addConstr(x2**2 + 9 * x3**2 + 64 * x6**2 >= 10)
    model.addConstr(3 * x3 + 5 * x5 + 8 * x6 >= 10)
    model.addConstr(x2**2 + 9 * x3**2 + 25 * x5**2 >= 10)
    model.addConstr(x1**2 + x2**2 + 9 * x3**2 >= 10)
    model.addConstr(9 * x3**2 + 25 * x4**2 + 64 * x6**2 >= 10)
    model.addConstr(5 * x1 + x2 + 5 * x5 >= 10)
    model.addConstr(x2 + 5 * x4 + 8 * x6 >= 10)
    model.addConstr(3 * x3 + 5 * x4 + 5 * x5 >= 10)
    model.addConstr(x2 + 3 * x3 + 8 * x6 >= 10)
    model.addConstr(x2**2 + 9 * x3**2 + 25 * x5**2 >= 10)
    model.addConstr(5 * x1 + x2 + 3 * x3 >= 10)
    model.addConstr(3 * x3 + 5 * x4 + 8 * x6 >= 10)
    model.addConstr(5 * x1 + x2 + 5 * x5 >= 10)
    model.addConstr(x2**2 + 25 * x4**2 + 64 * x6**2 >= 10)
    model.addConstr(9 * x3**2 + 25 * x4**2 + 25 * x5**2 >= 10)
    model.addConstr(x2 + 3 * x3 + 8 * x6 >= 10)
    model.addConstr(9 * x3**2 + 25 * x5**2 + 64 * x6**2 >= 10)
    model.addConstr(x2**2 + 9 * x3**2 + 25 * x5**2 >= 10)
    model.addConstr(-3 * x2**2 + 9 * x5**2 >= 0)
    model.addConstr(-x4**2 + 6 * x5**2 >= 0)
    model.addConstr(8 * x3 - 5 * x4 >= 0)
    model.addConstr(3 * x3 + 5 * x4 <= 20)
    model.addConstr(x2 + 3 * x3 <= 17)
    model.addConstr(5 * x4 + 8 * x6 <= 57)
    model.addConstr(9 * x3**2 + 25 * x5**2 <= 52)
    model.addConstr(3 * x3 + 8 * x6 <= 59)
    model.addConstr(x2 + 8 * x6 <= 13)
    model.addConstr(5 * x1 + 5 * x5 <= 57)
    model.addConstr(x1**2 + x2**2 + 64 * x6**2 <= 13)
    model.addConstr(5 * x1 + x2 + 5 * x5 <= 15)

    model.optimize()

    if model.status == gurobi.GRB.OPTIMAL:
        print("Optimal solution found.")
        print("Objective value:", model.objVal)
        print("x1:", x1.varValue)
        print("x2:", x2.varValue)
        print("x3:", x3.varValue)
        print("x4:", x4.varValue)
        print("x5:", x5.varValue)
        print("x6:", x6.varValue)
    else:
        print("No optimal solution found.")

optimize()
```