$\frac{9}{6}n^2-\frac{3}{2}n+1$
$12-5c<5$
$\csc^2\infty=\cot^2\infty+1$
$3x-13<1+x$
$81x^2+36x+7$
$8m^2n^2-10m^7n^4-20m^5n^2+12m^3n^3$
$tan^245$
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