Answer is 72
Step by step
Using order of math rules of PEMDAS, we do the inner parentheses “P” first, working outwards with parentheses and then exponents, multiply and divide, add and subtract.
2x [4x(2+1)x3] add inner parentheses
2 x [4 x 3 x 3] multiply inside brackets
2 x 36 multiply for your answer
= 72