$\lim_{x\to0}\left(\frac{6sin\left(x\right)-\left(x\right)}{x^3}\right)$

$x^2-y^2=-3$

$\int\left(x+5\right)e^{-\left(x^2+10x\right)}dx$

$\cos\left(a\right)=\csc\left(a\right)\cdot\tan\left(a\right)\cdot\cos^3\left(a\right)$

$y\frac{dy}{dx}=cos2x$

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

$\sqrt{342a^2b^6}$