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a fost răspuns

Calculeaz :{[(7x9-13)+6x4]:2(200-143)x6}= 31x{[(111+333+555):9-28]:2= ,{[(12x6-(132:2-72:6)]x3}-4= ,14x{[(96:3x16)x16)x(50-50)]x10000}=. {[(455:5)+9]:10+2000-143}+(3x2)=