$\int\:x\left(1+y^2\right)dx$

$\frac{sin\left(\frac{x}{2}\right)}{cos\left(\frac{x}{2}\right)}$

$\frac{u^2v^{-6}w^3}{uw^{-5}}$

$\frac{dy}{dx}\left(8+x^6\right)=\frac{x^5}{y}$

$f\left(x\right)=\frac{1}{7}x-2$

$\cos\left(-a\right)=\frac{5\sqrt{26}}{26}$

$2\cos^{2}a-\cosa=0$