$\frac{d^2}{d^2x}\left(x^3+y^3=28\right)$

$2^{8x-2}=4^{4x+1}$

$\left(sec\left(3\right)\:+\:cos\left(3\right)\right)\:\left(sec\left(3\right)\:-\:cos\left(3\right)\right)\:=\:tg^2\left(3\right)\:+\:sen^2\left(3\right)$

$\int\frac{1}{z\left(z-4\right)}dz$

$\left(-640:-4\right).\left(12:2\right)$

$\lim_{x\to\infty}\left(\frac{x+10^x}{3-10^x}\right)$

$\frac{d}{dx}x^5-6xy^3+y^4=1$