$\:14a\:-\:21b\:+\:35\:$
$16x^{2}+48xy+36y^{2}$
$5x^2=450$
$\sec\left(x\right)^2+2\csc\left(x\right)^2$
$\frac{dy}{dx}=\frac{4}{x^2-1}$
$3x^2+7x+4=0$
$\int_0^{\sqrt{\ln\left(2\right)}}2xe^{x^2}dx$
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