Question: Trouble with equation provided in Maple 13 using Maple 15

Professor is working in Maple 13  I have Maple 15 just started using this. 

He types 

DE1:=diff(TS(t),t)=3*k[abs]*IO*f/4/r[O]/c[W]/rho[O]-mu*T[O]/(s+1)/r[O]^2/C[W]/rho[O]*((Ts(t)/T[O]^(s+1)-1);

I can not type the math in this format in Maple 15. Can anyone help me, I keep getting error messages.

 

Thanks

CRS

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