$-4x^2+4x+15$
$56\cdot20$
$5x^2-45x+20=0$
$\int\frac{12x^2+15x+7}{\left(x-2\right)\left(x+1\right)^2}dx$
$9x^2+3x-14=0$
$205a-a$
$25x^2y^3-55xy^2$
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