$\int_0^1\left(\frac{1}{37+9cos\left(x\right)}\right)dx$

$\sec^2a+\cos^2a+\tan^2a=\sec^2a$

$3\left(t-4\right)+6=3\left(2t-4\right)$

$\left(-80\right)+\left(-201\right)+\left(-234\right)$

$\int\sqrt{9-x}dx$

$\lim_{x\to1}\left(\frac{x^2-x\log\left(x\right)-\log\left(x\right)-1}{x-1}\right)$

$y^1+y=3-3x$