Remember your order of operations by becoming familiar with the term PEMDAS. This term will help you remember which math operation you need to do first, starting from left to right. Here's a breakdown of the meanings.
P - Parentheses
E - Exponents
M - Multiply
D - Divide
A - Add
S - Subtract
Using PEMDAS simplify by doing the following when needed:
Step 1. do any math that's inside a parentheses,
Step 2. calculate exponents
Step 3. multiply
Step 4. Divide
Step 5. Add
Step 6. Subtract
In your expression you only need two of these.
First, calculate the exponent 2^2 = 4
Put the result back into the original expression like this:
6 + 4 = 10
There's your answer. This one is pretty simple but make a note of the PEMDAS trick and you'll be able to simplify much more difficult expressions. If you're stuck, let me know.