Hia, I tried using partial fractions to integrate this expression but the integrator function on wolfram mathematics gave me a different answer.

integrals.wolfram.com gave me where I presume the x is another constant

whilst I get which is almost there,,,but if anyone could help me that would be great! thankyou

For my partial fractions I substituted x=-1,x=3 then when I did x=1 to calculate the coefficient above the term x+3 I kept getting 7/4. It must be a minor mistake which I can't see anywhere!!!!!

x=1 X=3 X=1 ???????