Express 6x2−x+1(3x−1)(x+1)\displaystyle \frac{6x^2-x+1}{(3x-1)(x+1)}(3x−1)(x+1)6x2−x+1 in the form A+B3x−1+Cx+1\displaystyle A+\frac{B}{3x-1}+\frac{C}{x+1}A+3x−1B+x+1C.