Помогите пожалуйста #1099

[latex]1099\1);left(frac57ight)^2cdotfrac7{15}=frac{25}{49}cdotfrac7{15}=frac57cdotfrac13=frac5{21}\2);left(frac34ight)^2cdotfrac{32}{45}=frac9{16}cdotfrac{32}{45}=frac11cdotfrac25=frac25\3);left(frac12ight)^2cdotfrac45=frac14cdotfrac45=frac15\4);left(2frac57ight)^2cdotfrac{14}{19}=left(frac{19}7ight)^2cdotfrac{14}{19}=frac{(19)^2}{7^2}cdotfrac{14}{19}=frac{19}7cdotfrac21=frac{38}7=5frac37[/latex][latex]5);left(2frac13ight)^2cdotfrac{27}{98}=left(frac73ight)^2cdotfrac{27}{98}=frac{49}9cdotfrac{27}{98}=frac32=1frac12\6);left(frac8{11}ight)^2cdotfrac{11}{32}=frac{8^2}{(11)^2}cdotfrac{11}{32}=frac{64}{11}cdotfrac1{32}=frac2{11}\7);left(frac3{10}ight)^2cdotfrac56=frac{3^2}{100}cdotfrac56=frac3{20}cdotfrac12=frac3{40}\8);left(frac23ight)^2cdotfrac{15}{24}=frac49cdotfrac{15}{24}=frac13cdotfrac56=frac5{18}[/latex]