$\cos2x-2\sin^2x+3=2$
$\ln\left(-x+2\right)=6$
$\lim_{x\to\frac{\pi}{2}}\left(x^2\right)$
$24m^2+24mn+4n^2$
$-32x^2-44x-15$
$\frac{2^9}{\:5}x\frac{3^9}{7}$
$\frac{5x^2-10x+5}{x-1}$
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