$c^2+20c+99$
$\frac{x^2-1}{y^2-4}dy=2dx$
$9x^2-15x+4$
$20+90+510$
$3\left(2x+2\right)>4x-10$
$\frac{-x-2}{x+2}$
$x^5+3x^4-15x^3-35x^2+54x+72$
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