Answer:
it would be -6x^3 - 6x
Step-by-step explanation:
-6x^3-6x
https://www.symbolab.com/solver/step-by-step/%5Cleft(4x%5E%7B3%7D%2B3x%5E%7B2%7D-6x%5Cright)-%5Cleft(10x%5E%7B3%7D%2B3x%5E%7B2%7D%5Cright)
Answer
Pretty sure it's the one on the bottom left.
...... idk
Your answer is $16.40