1: \(=\dfrac{-3x^3+6x^2-x^2+2x-11x+22}{-x+2}=3x^2+x+11\)
2: \(=\dfrac{4x^4-2x^3-4x^3+2x^2+6x^2-3x-6x+3+2}{2x-1}\)
\(=2x^3-2x^2+3x-3+\dfrac{2}{2x-1}\)
3: \(=\dfrac{-2x^4-2x^2+x^3+x+2x^2+2-4x+3}{x^2+1}\)
\(=-2x^2+x+2+\dfrac{-4x+3}{x^2+1}\)
4: \(=\dfrac{x^4-x^2+3x^3-3x+2x^2-2+x-7}{x^2-1}\)
\(=x^2+3x+2+\dfrac{x-7}{x^2-1}\)

