\left( \frac{a^{2}}{a+b}-\frac{a^{3}}{a^{3}+2ab^{+}b}\right) =\left( \frac{a}{a+b}-\frac{a^{2}}{\left( a-b\right) ^{2}}\right) ​

valityuk    2   30.04.2021 15:38    4