$+2+1-4-3+6$
$arccos\left(cos\frac{3\pi}{2}\right)$
$\left(1+x^3\right)^{-\frac{1}{2}}$
$\sin^2\left(a\right)+\sin^2\left(b\right)=1$
$\sqrt[3]{8a^6b^6}$
$2xy\left(2x+zy\right)$
$\left(2x-5\right)^2<0$
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