Evaluate: (10+2i)+(5−7i)−(3+i)(10 + 2i) + (5 - 7i) - (3 + i)(10+2i)+(5−7i)−(3+i).
12−6i12 - 6i12−6i
12−4i12 - 4i12−4i
18−4i18 - 4i18−4i
18−6i18 - 6i18−6i