Question

-73+85-{-64+85-[136-49+635-(198+234)-27]}

Answer 1

−73+85−(−64+85−(136−49+635−(198+234)−27))

=12−(−64+85−(136−49+635−(198+234)−27))

=12−(21−(136−49+635−(198+234)−27))

=12−(21−(87+635−(198+234)−27))

=12−(21−(722−(198+234)−27))

=12−(21−(722−432−27))

=12−(21−(290−27))

=12−(21−263)

=12−(−242)

solucion

=254