Simplify the algebraic expression.
m + 
n + 
m - 
n
A. 
m + 
n - 
B. - 
m - 
n
C. 
m + 
n
D. 
m - 
n
Answer: D
Mathematics
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A. 8 B. (-2)2 C. (4)2 D. (-2)4
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A. 
B. 
C. 
D. 
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Find the exact value of the trigonometric expression without the use of a calculator.sin
A. 
B. 1
C. 0
D. 
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