$-99=94$
$\:6x-5+6y+5$
$\lim_{x\to\pi}\left(\frac{1+\cos\left(x\right)}{1-\cos\:\left(x\right)}\right)$
$\left(6a^2+6xy+y^2\right)+\left(-6a^2+4xy+9y^2\right)+\left(-7a^2-2xy-y^2\right)$
$-2x+2+-2+5$
$28x^5y^6+12x^3y^6$
$\frac{3x-5}{4}=\frac{x+1}{2}$
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