Hi, I've just copied and pasted the equations from my latex file. I hope you can see it now. Sorry. 

{dT}{dt}  = s - d[T] T - k_{1}VT,

{dT^{*}}{dt}  = k_{1}VT - d[T]T^{*} - k_{2} T^{*}

{dT^{**}}{dt} = k_{2}T^{*} - \delta T^{**}

{dV}{dt}  = N \delta T^{**} - k_{1}VT - cV

Thanks 

The numerical values are listed at the top and the four equations are listed below. What else is missing?

I'm doing a HIV model...

x(t) is the uninfected cells, y(t) are the infected cells, z(t) are the latent infected cells and u(t) are the virus cells...

I hope that helps.

Thanks