Integers and algebraic expression unit test

simplify the expression

8^2 + 9 ( 12 ÷ 3 × 2 )

8^2 + 9 ( 12 ÷ 3 × 2 )

= 64 + 9 ( 12 ÷ 3 × 2 )
= 64 + 9 ( 4 × 2 )
= 64 + 9 ( 8 )
= 64 +72
= 136