Sandbox

$C{D}_r=\frac{Y{L}_{r,t=1}}{KA{G}_{r,t=1}^{CDAL{F}_{r,s=1}}*LAB{S}_{r,s=1,t=1}^{(1-CDAL{F}_{r,s=1})}}$ BLOOP <math>CO^{2}Fert_{t+1}=\mathbf{envco2fert}*\frac{CO^{2}PPM-CO^{2}PPM_{t=1990}}{CO^{2}PPM_{t=1990}}