What is the simplified form of the quantity of x plus 8, all over the quantity of 3x plus 7 + the quantity of x plus 7, all over the quantity of x plus 4 ? (2 points) the quantity of 2x plus 15, all over the quantity of 4x plus 11 the quantity of 4x squared plus 40x plus 81, all over the quantity of 4x plus 11 the quantity of 2x plus 15, all over the quantity of 3x squared plus 19x plus 28 the quantity of 4x squared plus 40x plus 81, all over the quantity of 3x squared plus 19x plus 28