$3\log\left(2\right)+\frac{1}{2}\log\left(25\right)-\log\left(20\right)=\log\left(x\right)$

$w=x^2+y^2$

$-15+4x<13$

$\left(-427\right)-\left(-17\right)$

$\lim_{x\to79.123}\left(\csc x\right)$

$\left(1-2x\right)^2\left(1+6ax+15a^2x^2\right)$

$\lim_{x\to\infty}\frac{7^x}{x^2+7^x}$