Question

(2-1-3-1)-1 +(6-1-8-1)-1 simplify

Answer 1

=(2-1-3-1)-1+(6-1-8-1)-1
=2-1-3-1-1+6-1-1-8-1-1
=1-3-1-1+6-1-1-8-1-1
=-2-1-1+6-1-1-8-1-1
=-3-1+6-1-1-8-1-1
=-4+6-1-1-8-1-1
=-2-1-1-8-1-1
=-3-1-8-1-1
=-4-8-1-1
=-12-1-1
=-13-1
=-14

Answer 2

it may be helpful for you