$\frac{sin\:\left(x-y\right)}{cos\:x\:\:sin\:y}=tan\:x\:\:cot\:y-1$

$2\cos\left(\theta\right)-\sqrt{3}=0$

$3\left(x+1\right)=5\left(x-2\right)+7$

$\lim_{x\to1}\left(\frac{\sin\left(\pi x\right)}{x-1}\right)$

$f\left(x\right)=\frac{1}{5\left(2x^3+3x^2-12x\right)}$

$x-7>2x-5$

$-2tu+5tu+2tu$