Question

-12(4-7)+{-3(4+2)[7-(10+2)+20+4(6-1)]+12(7-9)+15}-10

Answer 1

-12(4-7)+{-3(4+2)[7-(10+2)+20+4(6-1)]+12(7-9)+15}-10
=-12(4-7)-3(4+2)(7-(10+2)+20+4(6-1))+12(7-9)+15-1
12(4-7)=-36
3(4+2)(7-(10+2)+20+4(6-1))=630
12(7-9=-24
=-(-36)-630-24+15-1
=36-630-24+15-1
=-604