integral(x+2) (2x-1)dx

(½x² + 2x) (x²-x) + c

3
[tex](x + 2)(2x - 1) = \\ (x \times 2x)(x \times - ( - 1)) + (2 \times 2x)(2 \times ( - 1)) = \\ {2x}^{2} + 3x - 2 + c[/tex]