a) [267+117x9-(832:2-531:9)]x10 =
= [267+1053-(416-59)]x10 =
= (267+1053-357)x10 =
= 963x10 =9630
b)30+4x[36:9+3x(20+8x42:2)]=
=30+4x[4+3x(20+168)]=
=30+4x(4+3x188)=
=30+4x(4+564)=
=30+4x568=
=30+2272=
=2302
d)9x(101x1+111:1)-[85-7x(36:9+63:9)] =
= 9x(101+111)-[85-7x(4+7)] =
= 9x212-(85-7x11) =
= 1908-(85-77) =
= 1908-8 =
= 1900