$2xdx+\left(1+x^2\right)dy=0$

$\int\left(\frac{1}{x\left(x^2-1\right)^{\frac{3}{2}}}\right)dx$

$e^{\left(x-1\right)}=e^{\left(2\left(x+1\right)\right)}$

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

$\left(x^2+x+2x+2\right)-\left(18+2x^2\right)$

$\frac{1}{2}\sqrt{12}$

$\left(-39\right)\left(+7\right)\left(-4\right)\left(-6\right)$