$\int\tan\left(\frac{3}{2}x-1\right)dx$
$\frac{3n^4}{3n^3}$
$124+643$
$c-2=\frac{18}{c}+7$
$412-28b$
$8x^2+9y^2+6x-9=0$
$1+tan^2\:sec^2$
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