Complete the table of products

1st monomial→2nd monomial↓
2x⁵y 3x² 4xy -7x²y 9x²y²
2x⁴x² 12xy 6x³ -14x³y 18x³y²
5y 12xy 20xy² -35x²y² 45x²y³
3x² 6x³ 12x³y -21x⁴y 27x⁴y²
4xy 8x²y 16x²y² -28x³y² 36x³y³
-7x²y -14x³y -28x³y² 49x⁴y² -63x⁴y³
9x²y² 18x³y² 36x³y³ -63x⁴y³ 81x⁴y⁴