Ineed this is so complicated for me

5(3) + 1/2(2)^2 - replace variables with parenthesis that contain the variable's amount.
15 + 1/2(4) - parenthesis/exponents, multiplication.
15 + 2 - addition left to right.
17. - final answer.

Remember PEMDAS, your answer will be 17.

Now that you know how to solve it, don't copy paste this post.
You'll get caught, I promise.
Now that you know PEMDAS, make an explanation.

Good luck.