$\frac{x^3+6x+2}{x+3}$
$-7cos^2x=7sin2x$
$\left(7+s\right)\left(7-s\right)$
$x^2+54x+729$
$3.250+0.95+0.21$
$\frac{4x^3-7x+30}{x-1}$
$\frac{dy}{dx}\left(-\sin\left(y\right)\right)$
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