a)69 + {65 - [ 33 - (2 x 4 - 5) ] }=



b)100+ {76 - [55- (2 x 7-4)]}=



c) 84 + {72 - [ 50 - (2 x 8 + 16) ] }=



d) 87+ {80 - [52 - (2 x 9-8) ] }=​
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