$y'-3y=0$

$x^2-2xm+m^2+k$

$9y^2+10y+1$

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

$\frac{x^{n+1}\left(1+3x+x^2-x^3\right)}{x-1}$

$\frac{1}{2}2730\cdot25.27^2$

$\frac{\left(-sin\frac{\pi}{4}x\right)}{3}$