$x^2y'-x^2y=0$

$\sin\left(3m\right)=1$

$\frac{3x^3-x-2}{x}$

$\frac{1+\csc\left(x\right)}{sec\left(x\right)}=cos\left(x\right)$

$f ( x ) = 2 ( 13 - x ^ { 4 } )$

$\frac{x^4-9x^2-x+2}{x^2+9}$

$\lim_{x\to\infty}\left(\frac{\left(3x-2\right)\left(x^2+5\right)}{\left(2x+1\right)^2}\right)$