$\frac{1}{2}\int\frac{1}{x\sqrt{x^2+4}}dx$

$\frac{125y^3+1}{5y+8}$

$\left(7a^3+7a^2+a\right)^2$

$600+\left\{\:20-\left[\left(3\right)\left(4\right)\right]+5\left[18-\left(16-11\right)\left(3\right)+\left(15-12\right)\left(4\right)\right]\right\}$

$\frac{e^{x+1}-e^xe^y}{e^xe^y}$

$2x^2+y^2-7=0$

$\frac{x^5-x^4+x^2-2}{\left(16\right)^2}$