Question

-4+6-{-2+5+4+[-6+5-8-(12+6-3)+5]+2}=
Solución?

Answer 1

-4+6-{-2+5+4+[-6+5-8-(12+6-3)+5]+2}=
2-{7+[-9-(15)+5]+2}
2-{7+[-9-15+5]+2}
2-{7+[-19]+2}
2-{7-19+2}
2-{-10}
2+10
12