$\int\frac{x^2+5x-1}{x^3-6x^2+3x+10}dx$
$a^2+11a+30=0$
$\int_0^1t^3e^{-t^2}dt$
$9x^2-48x+64$
$\frac{1}{2cosx\left(1-2cosx\right)}$
$2x^2-3x^2+2x+5x+7c$
$3x\cdot2+\:6x\cdot5\:-12x\cdot4\:+\:9x\cdot3$
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