I really don’t know this!!
1 answer:
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So the expression is: 
You can combine like terms, which are terms that contain the same variables raised to the same power. That means you can combine the two
. 
The other terms can't be combined.
Your final answer should be
.
You can combine like terms, which are terms that contain the same variables raised to the same power. That means you can combine the two
Your final answer should be