With the information you have provided, all I can really do is distribute what is outside the parentheses to what is inside the parentheses. If you need something else, please let me know in the comments.
-3(5 + 2x) = -15 - 6x = -6x - 15
-4(-8 + x) = 32 - 4x = -4x + 32
-(x + 2) = - x - 2
-8(5 + 9x) = -40 - 72x = -72x - 40
