differential equations

[eduardo_MO0@hotmail.com]

the calculator I throw the solution of a differential equation (this: y '''+ y''= 8 * x ^ 2) that I think is wrong, because it is too long and because it has things that should not take the solution (this : -16 * e ^ (- x) + G_0-G_2)

this is the complete answer that the hpp throws at me:
G_1 * x + G_2 * e ^ (- x) + (2/3) * x ^ 4- (8/3) * x ^ 3 + G_2 * x + 8 * x ^ 2-16 * e ^ (- x ) + G_0-G_2-16 * x + 16.

and if there is a way to fix it?
If there is not, please notify hp about this error

PS: can I upload screenshots that I made to my calculator that I have stored on my computer here about this problem? If so, how?