User:Imperial-J/Sandbox

\frac{\sin(\kappa R)}{\kappa R} \frac{\partial}{\partial R}\left[R^2\frac{\partial D_n(R)}{\partial R}\right]\,dR \sum_{65x^3(\infty*0)}$$
 * Math
 * $$x=\frac{2=8*9-34}{\sqrt{76-67}}$$
 * $$x_{1,2}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$
 * $$\sum^\infty y_{y+2}=\frac{(67+3)x*1-64}{\sqrt{65-78+12+x_2}} for x=5, y=1$$
 * $$\sum_{n=0}^\infty \frac{x^n}{n!}$$
 * $$\sum_{n=0}^\infty \frac{x^n}{n!}$$
 * $$\phi_n(\kappa) = \frac{1}{4\pi^2\kappa^2} \int_0^\infty
 * $$\begin{matrix} \underbrace{ a+b+\cdots+z } \\ 26 \end{matrix}$$
 * $$\begin{matrix} \underbrace{ x+h+y } \\ 26 \end{matrix} h=2, x=y$$
 * $$\sum_{y=3}^3 y$$
 * $$(\frac{y+3}{5}=10)(\sum^{\infty}_{0}n^h)=x \ \ n=y-7^2+2 \ \ \ What \ does \ x \ equal?$$