How do i plot this function

how do i plot: y'' - y' = - t - 5 in Matlab

[Dyuman Joshi]

Symbolic method -

syms y(t)
Dy=diff(y);
eq=diff(y,2)-Dy-2*t^2+t+5==0;
%random conditions
%You need conditions to obtain a specific answer
cond=[y(0)==0, Dy(0)==1];
z=dsolve(eq,cond)

z = 

fplot(z)