$2x^2+3x+1,\:x=0$
$\frac{y^2+3y}{x^2+1}$
$tan^32xsec2x$
$\int cos\left(3x+5\right)dx$
$y^2-14y+24$
$-3<\frac{1}{x}$
$\left(12x+4\right)\left(12x-8\right)$
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