a)10x[36x3-5x(72-60)]
10x(36x3-5x12
10x(108-60)
10x48
480
b)[44x5+9x(87-57)]x10
(44x5+9x30)x10
(220+270)x10
490x10
4900
c)[27x5+4x(98-34)]x10
(27x5+4x64)x10
(135+256)x10
391x10
3910
d)10x[65x6-(140-40)x3]
10x(65x6-100x3
10x(390-300)
10x90
900
