$x^4-25x^2+144$

$\frac{sin^3a+cos^3a}{sina\left(cosa+sina\right)}$

$-\sqrt{49}\left(-0.5\cdot4\cdot\frac{-1}{2}+1\left(20\cdot0.25\right)\right)$

$\frac{d}{dx}\left(c\cdot\:sen\left(lnx\right)\right)$

$\int\frac{\left(lnx\right)^2}{\sqrt[3]{x^3}}dx$

$\frac{x^2+8x^2+6x+1}{x+5}$

$\frac{x}{2}-7=9$