I have a solution shows :
-(((1 + 6 capA - 6 capC)^7 capD)/(2 (1 + 6 capA)^6 capC)) + e^((6 capC t)/(1 + 6 capA)) C[1]
Cap are constant but what is the C[1] means?
Thanks!
C[1] is the usual Mathematica notation for a constant of integration. If this were the solution of a second-order diff eq, you would also see C[2].