$\frac{d}{dx}\left(x^2-y^2=-7xy\right)$
$\left(x+\frac{1}{3}\right)^3$
$\int\sin\left(15x\right)\cdot\cos\left(7x\right)dx$
$\frac{x^2-8x+15}{3-x}$
$7\left(3f\right)$
$\frac{3x^{2}-15x+6}{x^{2}-2}$
$-5.82-\left(-7.8\right)$
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