$5x\left(4x+y\right)$

$\int\frac{6x^3-7x^2+2x-3}{2x-7}dx$

$x^3+x^2y-xy^2+y^3;x=1;x=2$

$\lim_{x\to\infty}\frac{x\:\ln\left(x\right)}{x^2-1}$

$\lim_{x\to0}\left(\frac{\cos\left(x\right)-1}{1-e^x}\right)$

$\int_{\frac{\pi}{4}}^{\frac{\pi}{2}}\left(9x\csc^2\left(x\right)\right)dx$

$\left(3x^2-\:2x\:+\:1\right)\:\left(5x\:-3x^2\:-\:2\right)$