-2-1+(3-1+1)-3(6+-1)=-1

Solution for -2-1+(3-1+1)-3(6+-1)=-1 equation:

Simplifying
-2 + -1 + (3 + -1 + 1) + -3(6 + -1) = -1

Combine like terms: 3 + -1 = 2
-2 + -1 + (2 + 1) + -3(6 + -1) = -1

Combine like terms: 2 + 1 = 3
-2 + -1 + (3) + -3(6 + -1) = -1
-2 + -1 + 3 + -3(6 + -1) = -1

Combine like terms: 6 + -1 = 5
-2 + -1 + 3 + -3(5) = -1

Multiply -3 * 5
-2 + -1 + 3 + -15 = -1

Combine like terms: -2 + -1 = -3
-3 + 3 + -15 = -1

Combine like terms: -3 + 3 = 0
0 + -15 = -1
-15 = -1

Solving
-15 = -1

Couldn't find a variable to solve for.

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