Sandbox

$SUMHLYLDWOR{K}_{\gamma }^t={\sum }^{M}HLYLDWOR{K}_{\gamma ,m}^t$

$WORLDDISABILIT{Y}^t={\sum }^{R}SUMHLYLDWOR{K}_{\gamma }^t$

$WORLDWORKPO{P}^t={\sum }^{R}POP15TO65_{\gamma }^t$