$3x^2-60x$

$\frac{dy}{dx}\ln\left(\sqrt{9-x^2}\right)$

$dy=e^{3\left(y-1\right)}\ln\left(x\right)dx$

$\int_0^{\infty}-\frac{1}{1+x^2}dx$

$\left(m-\sqrt{n}\right)\left(m+\sqrt{n}\right)$

$\left(1+sen\infty\right).\left(1-sen\infty\right)$

$\cos\left(15\right)=\frac{\sqrt{m}\left(\sqrt{n}+1\right)}{4}$