Find the quotient of the quantity negative 15 times x to the 2nd power times y to the 6th power plus 50 times x to the 4th power times y to the 3rd power minus 20 times x to the 2nd power times y all over 5 times x to the 2nd power times y.

−3y5 + 10x2y2 − 4
−15x2y6 + 50x4y3 − 4
3y5 + 10x2y2 − 4
−3xy5 + 10x2y2 − 4