$-20x^2+160x+10y^2+60y-225=0$
$\frac{d^4}{dx^4}\left(\ln\left(x^2+1\right)\right)$
$4g\:+\:7\:-\:9g\:-\:12$
$165\cdot5$
$\left(x^2+2xy\right)^2$
$\left(a^5-1\right)^2$
$f\left(x\right)=\left(5x-1\right)^2$
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