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= [14 x 2] + [5x 3] - [1 x 2] per (/) 6
= 28 + 15 -2 /6
= 41 / 6
b =-13/ 5 - 17/10 + 51 /15
= [-13x 6 ] - [ 17 x3 ] + [51 x2 ] per (/) 30
= -78 -51 + 102 / 30
= -129 + 102 / 30
= -27/ 30 = -9/ 10