d=((1-1)-1)-(1-(1-1))

Solution for d=((1-1)-1)-(1-(1-1)) equation:

Simplifying
d = ((1 + -1) + -1) + -1(1 + -1(1 + -1))

Combine like terms: 1 + -1 = 0
d = ((0) + -1) + -1(1 + -1(1 + -1))
d = (0 + -1) + -1(1 + -1(1 + -1))

Combine like terms: 0 + -1 = -1
d = (-1) + -1(1 + -1(1 + -1))
d = -1 + -1(1 + -1(1 + -1))

Combine like terms: 1 + -1 = 0
d = -1 + -1(1 + -1(0))

Multiply -1 * 0
d = -1 + -1(1 + 0)

Anything times zero is zero.
d = -1 + -1(1 + 0)

Combine like terms: 1 + 0 = 1
d = -1 + -1(1)

Multiply -1 * 1
d = -1 + -1

Combine like terms: -1 + -1 = -2
d = -2

Solving
d = -2

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Simplifying
d = -2