Answer:
a
Step-by-step explanation:
something are very complex
The solution of the given expression will be 
<h3>What is an expression?</h3>
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition,substraction, multiplication and division.
The given expression will be calculated as:-

Hence the solution of the given expression will be 
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Answer: No.
Step-by-step explanation: g should also be factored out. 10g(a - 3z).