( 2 1/3a+1 1/2b)^2(1 2/3m-1 2/5n)^2

1) [latex] (\frac{2}{3a} + \frac{1}{2b}) ^{2} [/latex] ([latex] (\frac{4b+3a}{6ab} ) ^{2} [/latex] [latex] \frac{(4b+3a) ^{2} }{36a ^{2}b ^{2} } [/latex] Ответ: [latex] \frac{16b^2+24ab+9a^2}{36a^2b^2} [/latex] 2) [latex]( \frac{2}{3m} - \frac{2}{5n} )^2[/latex] [latex] (\frac{10n-6n}{15mn} )^2[/latex] [latex] \frac{(10n-6m)^2}{225m^2n^2} [/latex] Ответ: [latex] \frac{100n^2-120mn+36m^2}{225m^2n^2} [/latex]