Question

46-{38-(-2)+-9+(42-18+-15)-(-7)}=

Answer 1

46−(38−(−2)−9+42−18−15−(−7))

=46−(40−9+42−18−15−(−7))

=46−(31+42−18−15−(−7))

=46−(31+24−15−(−7))

=46−(31+9−(−7))

=46−(40−(−7))

=46−47

=-1