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= [-8 +(-16 ÷ -4)] * -1- (-25* -2) + [ 7-(-4) - 5]*-(3)
= [-8 + (4)] * -1 -(50) +[ 7+4 - 5] * (-3)
= [ -8 +4] * -1 -50 + [ 6]] * . -3 ⇒ segundo las llaves
= [ -4* [-1-50 +6 ] ]* -3
= [ -4 * [ -43]] * -3
= [ 172 ] * -3
= - 516
.............Kd