f= c*(p - g)((t (2) - t (1)) - a(t (1) - t (2))^(b + 1)/(b + 1)) + g*(t (2) + a*(t (2)^(b + 1)/(b + 1))) + (c*(p - g)/(ab))((-b + 3)(t (1) - t (2))^(-b + 3)/2 - 3(t (1) - t (2))^2/((b + 1)(b + 2))) + (g/ab)((-b + 3)t (2)^(-b + 2) + (2at (2)/((b + 1)*(b + 2))));
t1 and t2 are variables
value of ‘a’ and ‘b’ are 00, rest of them are constants