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4/104
culegere
A)[1+2 9/40(3/4-1/120)]:1/5-3 B) (5/2)²×18/75+(1/2-1/6)²-(2/3)² C) {[3/4+1/4×(1/2)³:1/12]:2 3/8}:1 1/18-1/4​. Repede va rog dau 43 de puncte! din oficiu!