Need Mathematics help?

Question

2[18 - (5 + 3^2) / by 7]

Answer 1

Start with the inner most grouping symbol and work your way out.   Do Parentheses and Powers, then Multiplication or division whichever comes first from left to right, then addition or subtraction whichever comes first from left to right.

2[ 18 - (5+9)/7]

2[ 18- 14/7]

2[ 18- 2]

2[ 16]

32

Answer 2

Have you ever heard of Please Excuse My Dear Aunt Sally?

Parenthesis, exponents, multiply or divide (left to right), and add or subtract (also left to right).

2[18-(5+3^2)/7]

2[18-(5+9)/7]

2[18-(14)/7]

2[18-14/7]

2[18-2]

2[16]

32