$\frac{10x^2+13x-2}{5x}$

$55gn^2n^3x+110m^2n^3x^2$

$\lim_{x\to\infty}\left(xe^{\frac{8}{x}}-x\right)$

$\frac{x-2}{x}<5$

$2xy\:+3rt\:-xy-rt$

$\frac{1-\tan\left(x\right)}{\csc\left(x\right)-\sec\left(x\right)}=\sin\left(x\right)$

$\frac{\sec\left(y\right)}{1+\cot^2\left(x\right)}=\frac{1-\cos^2\left(y\right)}{\cos\left(y\right)}$