$a^2+7a+12=0$
$r^{2\:}-\:2r\:-\:3$
$log_{\left(9\right)}\left(2n^2-14n\right)=log_{\left(9\right)}\left(-45+n^2\right)$
$130+20\cdot10^2$
$\int\left(x\cdot\sqrt{7x+8}\right)dx$
$x^4-30x^2+125$
$y^2-14y\:+196$
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