$x^4-1x^3+x^2+2x+2\::\:x^{2\:}-x+1$
$11.9-2.4$
$\int\frac{2x}{x^4+2x^3+2x^2+2x+1}dx$
$2+3\cdot\left(2x-1\right)=x+4$
$\frac{2x^5-3x^3+1}{x^3+1}$
$\lim_{x\to1}\:\frac{ln\left(x\right)}{sin\left(3\pi\right)}$
$9m^4-6m^4+1$
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