It seems like you are trying to express the sum of $a$ and $b$ squared. If you mean $a + b^2$, then it is simply the variable $a$ added to the square of variable $b$.

If $a$ and $b$ are specific numbers, you can substitute them into the expression and calculate the result. For instance, if $a = 3$ and $b = 2$, then:

$a + b^2 = 3 + 2^2 = 3 + 4 = 7$

Would you like more details or have any questions?

Here are some questions you might find interesting:

1. What is the sum of 5 and $3^2$?
2. How do you expand the expression $(a + b)^2$?
3. Can you explain the difference between an equation and an expression?
4. What are the steps to simplify algebraic expressions?
5. How do you solve for $x$ in the equation $2x + 3 = 7$?

Tip: When working with algebraic expressions, be mindful of the order of operations (PEMDAS/BODMAS) to ensure accurate results.