a) = (267 + 117 x 9 - 357 ) x 10 = ( 267 + 1053 - 357 ) x 10 = 963 x 10 = 9630
b) = 30 + 4 x ( 36 : 9 + 3 x 188 ) = 30 + 4 x ( 4 + 564 ) = 30 + 4 x 568 = 30 + 2272 = 2302
c) = ( 2100 : 100 + 0 ) x 100 : 10 : 10 = 21 x 100 : 10 : 10 = 21
d) = 9 x ( 101 + 111 ) - ( 85 - 7 x 11 ) = 9 x 212 - ( 85 - 77 ) = 1908 - 8 = 1900
e) = 3 + 6 x ( 30 + 6 x 33 - 28 ) -3 = 3 + 6 x ( 30 + 198 - 28 ) - 3 = 3 + 6 x 200 - 3 = 3 + 1200 - 3 = 1200
f) = 2 + 2 x ( 2 + 3 x 1 ) = 2 + 2 x 5 = 2 + 10 = 12