$\int\frac{2t+2}{t^2-2t+1}dx$
$\left(6m\:-\:23\right)\:\left(6m\:-\:23\right)$
$\left(x+3\right)\left(x-3\right)-\left(x+8\right)^2$
$\cos x=\sin2x$
$-\left(-6x-5y-17\right)$
$\left(2\cos x-\sqrt{2}\right)\left(2\sin x+1\right)=0$
$\int6x^{-2}dx$
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