Question

{-20+(-7+9)elevado a 3 -[-7+9-(-1+5)]-(-1)elevado a 3}

Answer 1

{-20+ 2³- [-7+9-(+4)]-(-1)³}=

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

{-20+8-[-2] +1}=

{-20+8+2+1}=

{-12+2+1}=

{-10+1}=

-9