Приведите дроби к общему знаменателю: (2a-b)/(a^2-b^2) и 4/(2a+2b).

\[\frac{2a - b}{a^{2} - b^{2}} = \frac{2a - b^{\backslash 2}}{(a - b)(a + b)} =\]

\[= \frac{4a - 2b}{2\left( a^{2} - b^{2} \right)} = \frac{2(2a - b)}{2\left( a^{2} - b^{2} \right)} =\]

\[= \frac{2a - b}{a^{2} - b^{2}};\]

\[\frac{4}{2a + 2b} = \frac{4^{\backslash a - b}}{2(a + b)} =\]

\[= \frac{4a - 4b}{2\left( a^{2} - b^{2} \right)} = \frac{2(2a - 2b)}{2\left( a^{2} - b^{2} \right)} =\]

\[= \frac{2a - 2b}{a^{2} - b^{2}}\text{.\ }\]