Question

5-{[3 (7-5)]-{3+[2+6 (42-40]}}

Answer 1

5-((3 (7-5))-(3+(2+6 (42-40)))

5-((3 (7-5))-(3+(2+6(2)))

5-((3 (2))-(3+(4+12))

5-(6)-(3+(16))

5-6-(19)

-1-19

-20