$\left(x+\frac{1}{y}\right)\cdot\left(y+\frac{1}{x}\right)^2-\left(y+\frac{1}{x}\right)\cdot\left(x+\frac{1}{y}\right)^2$

$-4x-7\le-2x+5$

$y=\sqrt[9]{\frac{x-9}{x+2}}$

$\left(8x-2y\right)\left(-x-5y\right)$

$82a+2$

$\int\frac{50x^2+400x}{\left(x+4\right)^2\left(x^2+64\right)}dx$