$\ln\left(2x+15\right)-\ln\left(x\right)=\ln\left(3\right)$

$\left(m+n\right)-2\left(m+n\right)\left(m-n\right)+\left(m-n\right)^{\left(2\right)}$

$\frac{d}{dx}x^n=2$

$49x^2+14x+1=0$

$8a^6b^9-125c^{12}$

$\left(-x^8y\right)^5$

$\frac{\left(x^5+2x^4-2x^2-5x-12\right)}{\left(x^2-3\right)}$