Question

(3-1+4-1)+5-1 simplify it.

Answer 1

$\: \: \: (3 - 1 + 4 - 1) + 5 - 1 \\ = (7 - 2) + 4 \\ = 5 + 4 = 9$

Answer 2

(3-1+4-1)+5-1
=(7-2)+4
=5+4
=9