Question

1) 60 : {2 .[-7 + 18 : (-3 +12)]} -[ 7.(-3) -18 : (-2) + 1]=
alguém me ajuda​

Answer 1

$\small\boxed{\begin{array}{l}\sf60\div\{2\cdot[-7+18\div(-3+12)]\}-[7\cdot(-3)-18\div(-2)+1]\\\sf60\div\{2\cdot[-7+18\div(9)]\}-[-21+9+1]\\\sf60\div\{2\cdot[-7+2]\}-[-11]\\\sf60\div\{-10\}+11\\\sf-6+11=5\end{array}}$