Решите срочно!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1а 22p^4q^2 / 99p^5q = 2q / 9pб 7a / a^2+5a = 7 / a+5в(y-z)(y+z) / 2(y+z) = y-z / 2гa^2 - 1 / (a-1)^2 =  (a-1)(a+1) / (a-1)^2 = (a+1) / (a-1)31 / x+1  -2 / x-2 + 3 / x^2 -1 =  (x-2)(x-1) -2(x^2-1)+(x-2) / (x-2)(x^2-1)=  =  - (x^2+2x-2) / (x-2)(x^2-1)