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Calculati a÷4+b×2+10×c stiind ca a=183-(172+160)÷4+25×(5×3-15)= 100 b=25+3×[21-(7-7÷2]÷9= ? c=[20+4:6-4]×35×2×(5×15-2×3×5)= ? DAU COROANA!URGENT!