$\frac{d}{dx}\left(3sin\left(x-y\right)=6ysinx\right)$

$125\cdot1200^2$

$\left(\frac{\sin x}{\tan x}\right)^{2}+\left(\frac{1}{\csc x}\right)^{2}=1$

$6am\left(2+a\right)$

$\sqrt{1+tan^2\left(\frac{\pi}{2}-x\right)}$

$\frac{x^3-9^3}{x-9}$

$\int_0^1\left(\frac{\left(x-4\right)}{\left(x^2-5x+6\right)}\right)dx$