Question

-{[(-9)(3-27)-78]-[(-15)+9(-74)]-4}

Answer 1

−(−9(3−27)−78−(−15+(9)(−74))−4)

=−((−9)(−24)−78−(−15+(9)(−74))−4)

=−(216−78−(−15+(9)(−74))−4)

=−(138−(−15+(9)(−74))−4)

=−(138−(−15+−666)−4)

=−(138−(−681)−4)

=−(819−4)

=−815