Resolva as operaçoes a) (4+2i)+(1-2i) e B) (-2+3i) -(5+9i)

Dados os conjuntos a={0,1,5,6} b={0,2,3,4,6} c={1,2,4,6} e d={1,3,5,6} determine: a) (a-d) b) (b-c) c) (a-d)(b-c) d) (auc)(dud)