$\frac{d}{dx}7x^2$
$\left(-3^4\right)\left(-3^5\right)$
$3x^{2}-75y^{2}$
$\frac{x^4-5x^3+3x-7}{x-5}$
$\lim_{x\to0}\left(\frac{3x^2+1}{x^4}\right)$
$-\left(-\frac{1}{4\left(3\infty^2+2\right)^2}\right)$
$\int\frac{\sin2\left(x\right)}{4+\cos2\left(x\right)}dx$
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