a) [9*(15-2*7)]^3 =
[9*(15-14)]^3=
(9*1)^3 = 9^3 = 9*9*9 = 729
b)[25*(4*5^2-3^2*11)-2^3]^2-10^2 =
[25*(4*25-9*11)-8]^2-100=
[25*(100-99)-8]^2-100=
(25*1-8)^2-100 =
(25-8)^2-100=
17^2-100=
289-100=189
d) [(2^2*3+3^2*2+2^2*3^2):6]^2+4
[(4*3+9*2+4*9):6]^2+4=
[(12+18+36):6]^2+4=
(66:6)^2+4 =
11^2+4 =
121+4 = 125
