Question

{-20+(-7+9)³-[-7+9-(-1+5)]-(-1)³}
Alguém ?  

Answer 1

{-20+(-7+9)³-[-7+9-(-1+5)]-(-1)³}

{-20 +(+2)³ - [-7 + 9-(+4)]-(-1)}

{-20 +(+8)  - [ - 7 + 9 - 4] + 1}
{-20 + 8     -[ -11 + 9] + 1}

{ - 12        -[ -2] + 1}

{ -12         + 2 + 1}

{-12 + 3} = - 9

Answer 2

${-20 - (2)^3 -[-7 + 9 + 4]- (-1)} \\ \\ {-20 + 8 -[-7+9 - 5]} \\ \\ {-20 + 8 -[-7+4]} \\ \\ -20 + 8 + 3 = -9$