$16x^8-40x^4y^3+25y^6$

$\lim_{n\to\infty}\left(\frac{\left(n+1\right)^2x^{2\left(n+1\right)}}{5^{\left(n+1\right)}}\right)$

$\int\frac{x^3+x+5}{x^2+1}dx$

$2\cdot6+4\cdot4+8\cdot2$

$\frac{dr\:}{d\theta\:}=\theta\:-\frac{r}{3\theta\:}$

$4\cdot\cos\left(x+\frac{4\pi\:}{45}\right)$

$4cos^2\left(x\right)sin^2\left(x\right)-cos^2\left(x\right)=0$