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EFECTUATI. 25+4X[2+3X(4X10-5)-93]-3X(3+24)=, [[7-5)X6X(4X3-10)-[3+(4X9-7X5)+3X2])X2-28=, 39X12+[(19X6-14X5)X8-(21X5-7X13)X14]X3=, 4X[6X3-[3X(16+9)-2X3+5-18X4]X3]-(29-16¸+2)X3=, [(15-3X4)X5-9]X8-2[13-(5X7-6X4)+4X5]