Here are some math examples. If you do not see math formulas, please ask for support.
2 = ( ( 3 − x ) × 2 3 − x ) {\displaystyle 2=\left({\frac {\left(3-x\right)\times 2}{3-x}}\right)}
∫ a x ∫ a s f ( y ) d y d s = ∫ a x f ( y ) ( x − y ) d y {\displaystyle \int _{a}^{x}\!\!\!\int _{a}^{s}f(y)\,dy\,ds=\int _{a}^{x}f(y)(x-y)\,dy}
ϕ n ( κ ) = 1 4 π 2 κ 2 ∫ 0 ∞ sin ( κ R ) κ R ∂ ∂ R [ R 2 ∂ D n ( R ) ∂ R ] d R {\displaystyle \phi _{n}(\kappa )={\frac {1}{4\pi ^{2}\kappa ^{2}}}\int _{0}^{\infty }{\frac {\sin(\kappa R)}{\kappa R}}{\frac {\partial }{\partial R}}\left[R^{2}{\frac {\partial D_{n}(R)}{\partial R}}\right]\,dR}