2(2)(-3)(4) - 3(2)(-3)
4(-3)(4) - 6(-3)
-12(4) - (-18)
-48 + 18
-30
Whenever there are two minus signs next to each other, your answer should become a positive. If there is one minus sign and one addition sign, it will stay a negative sign. If there are two addition signs, the addition sign will stay the same.
(-) (-) = +
(-) (+) = -
(+) (-) = -
(+) (+) = +
