$\int\sqrt{4-t^2}dx$

$y^'=\frac{x-1}{y}$

$\int\frac{2x+6}{\left(2x+3\right)\left(x+1\right)^2}dx$

$7\tan\left(x\right)-11\sin\left(x\right)=0$

$y'=\frac{6x+3xy^2}{x^2y+y}$

$\lim_{x\to\infty}\left(\frac{3x^4+3}{5x^3-x^2-3}\right)$

$\left(1-y\right)y^{-2}dy=x\sin\left(x\right)dx$