$\log\left(x-1\right)+\log\left(5\right)=\log\left(3x+1\right)$

$\lim_{x\to0}\left(\frac{1-\cos\left(x^2\right)}{x^3}\right)$

$-83\cdot86$

$\int\left(a^2-2a+3\right)ln\left(a\right)da$

$\frac{dy}{dx}=bxe^{\left(-ax\right)}$

$\left(x-5\right)\cdot\left(x^3-2x^2\right)$

$5x^2-2x+6\le0$