$x^2-\frac{2x}{5}$
$3x^2\:-\:25x\:+\:22\:$
$\left(m^2+m-1\right)\left(-m^2+m+1\right)$
$8a^3+32a^2+6a+24+4a^2+16a-3a-12$
$-+\left(-1\right)$
$-xyz+6x^3y+2y^2-10xyz-x^3y+8xyz$
$\lim_{x\to-1}\left(\frac{5x^4-5x^2}{3x^4-17}\right)$
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