$12x^4+6x^3-9$
$\frac{2\sin\left(t\right)-3\tan\left(t\right)}{\tan\left(t\right)}$
$60+71-t^2$
$y^2=x-2$
$\ln\left(x\right)+\ln\left(x-3\right)=\ln\left(6x\right)$
$-3x^2+42=-15x$
$y^2-4x^2+40x-104=0$
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