$2^3-3^2$
$\sin\left(\frac{\pi}{6}-x\right)$
$\frac{\sin\left(4x\right)+\sin\left(2x\right)}{\cos\left(4x\right)+\cos\left(2x\right)}=\tan\left(3x\right)$
$s^2-8\cdot s+41=0$
$\frac{5}{40i+10}$
$y+x^2=4y$
$\lim_{x\to\infty}\left(1+\frac{1}{x}\right)^x$
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