order of operations
PEMDAS
parenthasees first
exponets
mulitplcaiorn or diviosn
addition or subtraction
A. (2-8)(-4-6)=(-6)(-10)=60
B. 2-8(-4)-6=2+32-6=28
C. 2-(8*-4-6)=2-(-32-6)=2-(-38)=2+38=40
D. (2-8)(-4)-6=(-6)(-4)-6=24-6=18
D is answer
B is wrong answer, what are are schools teaching now