$cos^2x=\frac{1}{\sin\left(x\right)^2\cdot\cos\left(x\right)^2}$

$10\:\cdot\:\left(a-2.5\:+\:0.5b\right)$

$\frac{\left(a^{\frac{6}{9}}\right)\left(a^{\frac{2}{6}}\right)\left(a^{\frac{6}{6}}\right)}{\left(a^{-8}\right)}$

$-4\left(x+\frac{1}{2}\right)>3+\frac{3}{2}x$

$\lim_{x\to0}\left(\frac{2ay^{\frac{1}{3}}}{3x^{\frac{1}{3}}}\right)$

$\left(x^3+4\right)^3$

$\frac{dy}{dx}+ycos\left(x\right)=8cos\left(x\right)$