dy/dt = [-pi*cos(pi*t)-2ty]/[1+t^2]

Find the fourth degree polynomial centred about 0

I know the taylor polynomial goes y(0) + hy'(0) + h^2/2y''(0) + h^3/6y'''(0) + h^4/24y''''(c)

The problem I am having is not being able to find y'''(0) I know its meant to be h^3[pi(pi^2 + 6)]/6 But i just can't seem to be able to get that answer..Can anyone help out please?