How to do it and how to work it out what do i need to do

14

Step-by-step explanation:

You can first find out whats in the parenthesis, then you multiply it by the number next to the parenthesis like this: 6+ (3 * 11) - 5^2.  Now we get

6 + 33 - 5 ^ 2 [aka 5 * 5 aka 25] Now we have 6 + 33 = 39, so 39 - 25 = 14.

not sure but it may be b, as i said i'm not sure.