$169x^2-225y^4$
$\left(-32\right):\left(-4\right):\left(-2\right)$
$\int_0^{\frac{\pi\:}{6}}\:cos4x\cdot sin2xdx$
$x^7lx$
$\int_{\frac{\pi}{4}}^{\frac{2\pi}{3}}\left(sec^{2\:}x\right)dx$
$\frac{dy}{dx}=\frac{3x}{10y}$
$4 x ^ { 2 } - 30 x + 56 = 0$
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