$\sin\left(cos^{-1}\left(\frac{5}{6}\right)-tan^{-1}\left(\frac{1}{3}\right)\right)$
$2x\sqrt{x}2+4$
$-2x^2+4-7x^2-4x+2-2+4x$
$350.250\:-74.000$
$\frac{1}{x-\sqrt{x+2}}$
$\frac{\left(1-sin^2a\right)}{2}$
$2x+2y-1+y'\left(x+y-2\right)=0$
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