1) = х(х+у) / (х+у)(х-у) = х/(х-у)
2) = (m-2)(m+2) / m(m-2)= (m+2)/m
3) = a(a+3)/ (3-a)(3+a) = a/(3-a)
4) = (2-a)(2+a) / a(a+2) = (2-a)/a
5) = ax(x-1) /ax = x-1
6)= ab / ab(1-b) = 1/ (a-b)
7) = q (q+2) / (q+2)² = q/ (q+2)
8) = n(m+n) / n (m+1) = (m+n) /(m+1)