1) ((m-n)(m^2+mn+n^2))/((m-n)(m+n))=(m^2+mn+n^2)/(m+n)
2)(3(p-q)(p+q))/(6(p+q)(p^2-pq+q^2))=(p-q)/(2(p^2-pq+q^2))
1) ((m-n)(m^2+mn+n^2))/((m-n)(m+n))=(m^2+mn+n^2)/(m+n)
2)(3(p-q)(p+q))/(6(p+q)(p^2-pq+q^2))=(p-q)/(2(p^2-pq+q^2))