1. Вычислите:  а) (2-3i)+(i+1)
б) (2-3i)+(-1-i)
в) (2-3i)-(i+1)
г) (i+1)-(-1-i)
д) (2-3i)x(i+1)
е) (-1-i)x(i+1)

2. Вычислите: 
a) (2-i)(2+i)-(3-2i)+7
б) (1+i)^4
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