Answer:
9x9y6+4x7y^6
Step-by-step explanation:
4x^7y^6+9x^3yx2x^4y^5
=4x^7y^6+9x^9y^6
=9x^9y^6+4x^7y^6
Answer:4x^7y^6 + 18x^6y^6
