$n2+18n+81$
$\int f\sin\left(f^2\right)df$
$\frac{sin\:a-cos\:a\:+1}{sin\:a+cos\:a-1}=\frac{sin\:a+1}{cos\:a}$
$b^2-12b-36$
$\left(3\:-\:p\right)\left(3\:-\:p\right)$
$x^2\left(3y-1\right)+\frac{dy}{dx}=0$
$x^3+2x^2+2x+1$
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