$dx+\left(xy+2yx^{\frac{1}{2}}\right)dy=0$

$\left(2m^2+4mn+2n^2\right)\left(m-n\right)$

$\lim_{x\to0}\left(x-\frac{\sin\left(2x\right)}{\tan\left(x\right)^{-1}}\right)$

$3xn-1+2xn+1+4xn-1-5xn+10$

$17-7x>1-3x$

$cos^2x=0.6$

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