A \times negParens(B) = ?
A negative times a negative is a positive.
A negative times a positive is a negative.
A positive times a negative is a negative.
0 times any number is 0.
A \times negParens(B) = C
C \div negParens(B) = ?
A negative divided by a negative is a positive.
A negative divided by a positive is a negative.
A positive divided by a negative is a negative.
0 divided by any number is 0.
C \div negParens(B) = A