Question

resolva as expressões 4-{-6-[+7+(-3+1)]+5}

Answer 1

4 - { -6 - [ + 7 + ( -3 + 1)] + 5 } =
4 - {-6 - [ + 7 + ( -2) ] + 5 }=
4 - { -6 -[ + 7 - 2 ] + 5 }=
4 - { -6 - [ +5] + 5 } =
4 - { -6 - 5 + 5 } =
4 - { -6} =
4 + 6 = 10 ****