$40x^2-22x+3$
$2\cdot2x^3\cdot7$
$\frac{2k+1}{k}$
$13y^2=3+10x^2$
$\frac{dy}{dx}\left(9x^2-y^2=1\right)$
$\lim_{x\to0}\left(\frac{8e^{2x}-cos\left(2x\right)+4x}{4sen\left(2x\right)-2x}\right)$
$\frac{dy}{dx}\left(x^2y=54\right)$
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