I have to divide (x to the forth power) + (5x to the third power) - X squared - 3x-1
divided by (2x-5):eek: :eek:

(x^4+5x^3-x^2-3x-1)/(2x-5)

http://en.wikipedia.org/wiki/Polynomial_long_division
http://www.purplemath.com/modules/polydiv2.htm

for a start look there.
I'll check back tomorrow and see if you've gotten anywhere or if I can give a better answer