$2\cos^2\left(x\right)-1=\cos^2\left(x\right)-\sin^2\left(x\right)$

$\sqrt[3]{a^3+b^3}$

$\frac{x^n}{2^n}$

$\left(380-150-230\right)-\left(1500-1200-2700\right)$

$9cos\left(x\right)^2+9tan\left(x\right)^2\cdot cos\left(x\right)^2=9$

$\left(u^2+u-6\right)\left(y^2-4x^2\right)$

$\int\frac{5}{x-5}dx$