Выполните действие: b/c²-bc : b³/c²-b² m²-n²/2mn² • 2mn/3m-3n a²b/a²-2ab+b² : a/ab-b²...

Решите задачу:

$\frac{b}{c^2-bc}: \frac{b^3}{c^2-b^2}= \frac{b}{c(c-b)}* \frac{(c-b)(c+b)}{b^3}= \frac{c+b}{b^2c} \\\\ \frac{m^2-n^2}{2mn^2}* \frac{2mn}{3m-3n}= \frac{(m-n)(m+n)}{2mn^2}* \frac{2mn}{3(m-n)}= \frac{m+n}{3n}\\\\ \frac{a^2b}{a^2-2ab+b^2}: \frac{a}{ab-b^2}= \frac{a^2b}{(a-b)^2}* \frac{b(a-b)}{a}= \frac{ab^2}{a-b}\\\\ \frac{p^2+2pq+q^2}{2p} * \frac{2p}{p^2-q^2}= \frac{(p+q)^2}{2p}* \frac{2p}{(p-q)(p+q)}= \frac{p+q}{p-q}$