2.1. BbIIIOJIHUTe LICTICTBHe: (5+i)/(2+3i) 2.2. BblyHCJIHTe: (1-i)^3 23. Bbluncjiute: (1+i)^3 2.4 . Bbruncjurre: (1+i)^4 2.5 Bbruncourre: i^20+i^12-i^10

1. To simplify this expression, we can multiply both the numerator and denominator by the conjugate of the denominator, which is . 2. To simplify this expression, we can expand it using the binomial theorem or by multiplying the expression by itself. 3. To simplify this expression, we can expand it using the binomial theorem or by multiplying the expression by itself. 4. To simplify this expression, we can expand it using the binomial theorem or by multiplying the expression by itself. 5. To simplify this expression, we can use the fact that .