Question

cuanto es
-(4-7)-[(9-5)-(-3-4)]

Answer 1

−(4−7)−(9−5−(−3−4))

=−(−3)−(9−5−(−3−4))

=3−(9−5−(−3−4))

=3−(4−(−3−4))

=3−(4−(−7))

=3−11

=-8