$12.5x^2+228x\:-\:10260$
$\tan\left(x\right)\left(\cos\left(x\right)\right)\frac{1}{\sin\left(x\right)}=1$
$\frac{m^4n^4}{3m^4n^2}$
$x^2+x-240$
$3^{4-2}$
$x+1+2x+2\:3x-3$
$\frac{x^3+1}{x^3-5x^2+6x}$
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