Find the volume of a rectangular prism if the length is 3x2, the width is 2x, and the height is x2 + 3x + 5. Use the formula V = l ⋅ w ⋅ h, where l is length, w is width, and h is height, to find the volume.
5x^5 + 18x^4 + 30x^3
5x^6 + 18x^4 + 30x^3
6x^5 + 18x^4 + 30x^3
6x^6 + 18x^4 + 30x^3