Question

(5+2).[(5+2)^2 -85/5-2]

Answer 1

\(=7\cdot\dfrac{7^2-85}{3}=\dfrac{7\cdot\left(49-85\right)}{3}=7\cdot\dfrac{-36}{3}=-12\cdot7=-84\)

Answer 2

\(=\)\(7\left(7^2-\dfrac{85}{5}-2\right)\)

\(=7\left(49-\dfrac{85}{5}-2\right)\)

\(=7\times\left(49-17-2\right)\)

\(=7\times\left(32-2\right)\)

\(=7\times30=210\)