$9x^2-6x+5=0$
$\left(-7x\:+\:2\right)\left(-7x\:-\:2\right)$
$\int\frac{x}{x^2+y^2}dy$
$\lim_{x\to\infty}\left(\frac{lnx}{x^2}\right)$
$\frac{y^2}{2}+c=x^2+c$
$2x^2-450=0$
$\int\:\frac{1}{\left(\sqrt{25-x^2}\right)^3}dx$
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