$cos\left(2x\right)-2\cdot\:\:cos^2\left(\frac{x}{2}\right)=1$
$\left(2a+3b^2\right)\left(2a-3b^2\right)$
$3\left(6x-1\right)$
$\frac{d}{dx}\left(sin\left(x^2\right)^{2ln\left(x\right)}\right)$
$\lim_{x\to0}\left(\frac{x-sin\left(x\right)}{xsin\left(x\right)}\right)$
$7x^2-5x^2$
$\left(a^mb^y+4\right)^2$
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