$\log\left(2x-5\right)-\log\left(\sqrt{\left(5+x\right)}\right)=\log\left(\sqrt{\left(5-x\right)}\right)$

$\lim_{x\to e}\left(\frac{e^x-x^e}{x-e\cdot\ln\cdot x}\right)$

$\left(x^2+4\right)dy=\left(y^2-9\right)dx$

$14-1-1$

$\left(logx\right)^4=8logx$

$\frac{x^2}{y}=c$

$\int_{-1}^1\left(16x^3-3x^2-8\right)dx$