$\int_0^{\infty}\left(\frac{x}{x^2-1}-\frac{2}{3x+1}\right)dx$

$\int sc^5\left(x\right)\:dx$

$3\tan\left(60^{\circ}\cot30^{\circ}\sin45^{\circ}\csc45^{\circ}\right)$

$\frac{dy}{dx}=\frac{xy+3x}{x^2+1}$

$\frac{x^6-b^6}{x+b}$

$cos4x=2cos^2\left(2x\right)-1$

$-18+3\left(-10+3\cdot7\right)$