$\frac{d}{dx}\left(\frac{4x^2-9}{x^2-16}\right)$

$senx+cosx=\frac{1+tgx}{secx}$

$-808+201\left(x-4\right)+44\left(x-4\right)\left(x\right)+3\left(x-4\right)\left(x\right)\left(x+6\right)$

$\int\left(3x^2-6x+6\right)dx$

$\frac{0.00045}{280000000000}$

$3x^2+23x+20$

$\left(-3\right)-\left(-8\right)-\left(-5\right)+8$