A)
(2-i)(2+i) - (3-2i) + 7
= (4 + 2i - 2i -i^2) - 3 + 2i + 7
= (4 -i^2) - 3 + 2i + 7
= (4 -(-1)) - 3 + 2i + 7
= (4 + 1) - 3 + 2i + 7
= 5 - 3 + 2i + 7
= 2 + 2i + 7
= 9 + 2i

B)
(1+i)^4
= (1+i)(1+i)(1+i)(1+i)
= (1 + 2i + i^2)(1 + 2i + i^2)
= (1 + 2i - 1)(1 + 2i - 1)
= (2i)(2i)
= 4i^2
= 4(-1)
= -4

Ответ:
A) 9 + 2i
B) -4