$42.02\:-\:29.91$

$\int\frac{e^{7x}}{e^{14x}+2e^{7x}+1}\:dx$

$\frac{dy}{dx}=\frac{3x^2+4x+2}{y-1}$

$\lim_{x\to0}\left(\frac{1-e^{x+1}}{x+1}\right)$

$\int\frac{sen^2\left(x\right)}{cos^3\left(x\right)}dx$

$-4\left(-\left(2\sqrt{3}\right)^2+9\right)$

$\left(1-cos^2q\right)\left(1+tan^2q\right)=tan^2q$