б) х^(12+5-14) = x^3

в) а^(3n+5+5n+3+2n+3-10n-9) = a^2

1) x^(4-9+14) = x^9

2) x^(15+(21-13)) = x^23

3) x^(5-2-2) = x

4) x^(10-(10-5)) = x^5