$\sin\left(37\right)=\frac{x}{60}$
$x^2-120x-3746.9$
$\frac{d^8}{dx^8}\left(cos\left(4x\right)\right)$
$\frac{1}{4}b-\frac{2}{5}b+\frac{1}{5}b$
$sen30.sen\:60-cos\:30$
$x^2-13x-40$
$e\:^{lnx-x+c}$
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