$\cos\left(x\right)+\cos\left(2wy-x\right)$
$\int\frac{7}{8}dy$
$\lim_{x\to3}\left(\frac{x-3}{2-\sqrt{x+2}}\right)$
$x^2+\frac{195}{81}x+\frac{169}{81}$
$\sqrt{\frac{4a^2}{9x^2}}$
$3\tan\:x=\sqrt{3}$
$a=\left(x+1\right)^2+\left(x-1\right)^2-2\left(x^2-1\right)$
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