Evaluate the indefinite integral: $\int (2x-5)(x+6)dx$

$2x^3+7x^2-30x+C$

$\frac{2}{3}{x}^3+\frac{7}{2}{x}^2-30x+C$

$\frac{2}{3}{x}^3+\frac{7}{2}{x}^2-30+C$

$\frac{3}{2}{x}^3+\frac{7}{2}{x}^2-30x+C$