Hi there, i was puzzling over this today and wonder if someone could help.

if i had a line of some equation, say

$\displaystyle y=3(x^3)+2(x^2)+x+1$

which is just some cubic, how would i calculate the length of a line between say, 0 and 5? obviously i would have to use integration by substitution, but where do i go from there?

thanks