Answer: -23520x^6y^2
Step-by-step explanation:
Let's combine the like terms. Let's look at the numbers. We have -14, 42, 5, and 8. We multiply all of these by each other to get: -23520.
Now let's look at the x's. If we count the x's we can see that there are 6 x's. We have x^6.
We can see that there are 2 y's so we have y^2.
We put this all together to get: -23520x^6y^2
Hope this helps! :D