$\frac{1}{1}+\frac{8}{10}+\frac{1}{5}$

$y^2+y^2$

$\int\frac{e^x}{\left(e^x+1\right)^5}dx$

$\frac{d}{dx}.005x^3+.04x^2+.7x$

$\sqrt{40u^{15}}$

$\frac{\cos\left(x\right)^2}{\sin\left(x\right)}+\left(\frac{-\cos\left(x\right)\cos\left(x\right)}{1+\tan\left(x\right)\cos\left(x\right)}\right)$

$81y^2-18xy+x^2$