$x^2y'+xy=x$

$\int\left(\frac{1}{x+10}\right)dx$

$ax^2+3ax^2-10ax^2+5a^2x$

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

$2b^2\sin^2\left(x\right)dx=dy$

$\frac{2\left(1-\sin^2\left(x\right)\right)}{\cot\left(x\right)}=\sin\left(2x\right)$

$1^2-5-1$