$\log\left(e^{-y}\right)$

$\int-2\left(5x-1\right)cosh\left(-5x^2+2x-3\right)dx$

$\int\frac{-2x^2-4x}{\left(x-1\right)^2\left(x^2+1\right)}dx$

$\int\:\frac{\left(sen^2x\left(cot^2x+1\right)\right)}{cosx+senx}\:dx$

$\frac{1}{m^2-m}+\frac{1}{m}=\frac{5}{m^2-m\:}$

$xy'+y=0;y\left(1\right)=3$

$2\left(2x-3\right)>14$