$4x^2-8x+1=0$
$\lim_{x\to a}\left(\frac{x^2-\left(a-1\right)+a}{x^3-a^{3\:}}\right)$
$7\left(3+\left(-2\right)-\left(-3\right)\right)$
$97a^3^2$
$\frac{6x+2}{7x^2-2}$
$2a^2+5a-12$
$4x+3x^{2}+5x^{3}+6x$
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