$7-x^2-\:x\:para\:x=-2$

$\frac{d}{dx}\left(\sqrt{\left(\frac{x}{x+1}\right)^2+9}+\frac{x}{x+1}\right)$

$-26+\left(-8-4+2\right)-\left(-5\right)$

$\int\left(\frac{100}{w^2\sqrt{25-w^2}}\right)dw$

$x\log\left(z\right)+\log\left(c\right)-2\log\left(y\right)$

$\left(2x+\frac{6y^3}{5}\right)^4$

$\left(3xy^2+5xy\right)\left(2xy^2-3xy\right)$