Question

выражение 12:6+3*4*5+5*4-40(36:9+12):4

Answer 1

2+4*5*(3+1)-10*(4+12)=
2+2*5*(2*3+2*1-4-12)=
2+2*5*(6+2-4-12)=
2+2*5*(-8)=2*(1-5*8)=
2*(-39)=-78