3(-3+-1)-4(-3+1)=

Solution for 3(-3+-1)-4(-3+1)= equation:

3(-3+-1)-4(-3+1)=0

We simplify the equation to the form, which is simple to understand 
3(-3+-1)-4(-3+1)=0

Simplifying terms in parentheses
3*(+-1-3)-4*(-3+1)=0

Simplifying terms in parentheses
3*(+-1-3)-4*(-2)=0

Reorder the terms in parentheses
+(-9)-4*(-2)=0

Simplifying terms in parentheses
+(-9)-4*(-2)=0

Remove unnecessary parentheses
-9-4+*(-2+)=0

Reorder the terms in parentheses
-9+(+8)=0

Remove unnecessary parentheses
-9+8=0

We move all terms containing  to the left and all other terms to the right. 
0=0-0+9-8

We simplify left and right side of the equation. 
0=+1

0=1

The left and right sides are not equal, therefore there is no solution. This equation is invalid.