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The three algebraic expressions are:
 
\(A = 2p + 8q\)
 
\(B = 8p + 5q - 3r\)
 
\(C = -6p + 5q + 4r\)
 
Then, the value of the expression \(A - B + C =\) ip+iq+ir
 
(Note: Insert '\(-\)' sign if necessary.)