$\int125x^4\left(5x^5+2\right)^{-3}\:dx$

$\left[8-15:\left(-5\right)\right].\left(-3\right)-4.\left(-10:2\right)$

$\frac{do}{dt}=\sin\left(o\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{\csc\left(6x\right)}{\csc\left(2x\right)}\right)$

$\sec\left(a\right)\left(\sec\left(a\right)+2\sin\left(a\right)\right)=\left(\tan\left(a\right)+1\right)^2$

$\frac{dy}{dx}\:x^{\frac{1}{5}}+y^{\frac{1}{5}}=4$

$\frac{2x^4}{6x^2}$