$64y^2-32y+4$
$\left(x-2\right)\left(x+3\right)\le x\left(x-1\right)-8$
$-16\cdot7$
$3\tan\left(2x\right)=-3$
$2x+5y-3x+11y$
$\lim_{x\to0}\left(\frac{1}{e^{sinx}-1}-\frac{1}{sinx}\right)$
$4a^2-\:4b^2$
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