If you add them all you get 50x12y13
The equivalent expression to
is 
Step-by-step explanation:
Step 1:
In sums like these, it is easier to take the common term out of the simplification.
In the expression
, the common term between
and
is the term s. So we take the term s as the common factor.
So taking s out of
we get 
Step 2:
If we multiply a positive with a negative we get a negative. S0 

So the equivalent expression to
is 
Answer:
A)
Step-by-step explanation: