$20x^2+2x-6=0$
$\int\left(tan2x-sec2x\right)^2\:dx$
$53.45+3.36+2.15$
$\int\frac{2x+1}{x-2}dx$
$3m^2n-8m^2n$
$-486x-48$
$-10b+b$
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