The mathematical expression in the image you provided is:

$3 + 2^3 - 6 \div 2$

To solve this expression, we'll follow the order of operations (PEMDAS/BODMAS):

1. Exponents: Calculate $2^3$, which equals 8.

   $3 + 8 - 6 \div 2$

2. Division: Next, divide 6 by 2.

   $3 + 8 - 3$

3. Addition and Subtraction: Now, we handle the addition and subtraction from left to right.

   $(3 + 8) - 3 = 11 - 3 = 8$

So, the result of the expression is 8.

Let me know if you would like further details or have any questions!

Related Questions:

1. What is the order of operations in math?
2. How do you handle multiple operations in an expression?
3. What is the difference between exponents and powers?
4. How do you solve equations with fractions or decimals?
5. What happens if you change the order of operations?

Tip: Always remember to handle exponents and division/multiplication before addition and subtraction in any expression.