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Simplified formula | - 5A + | - A / 6 "|" is the sign of absolute value

Simplified formula | - 5A + | - A / 6 "|" is the sign of absolute value

|-5a+|a||/6
When a > 0
|-5a+|a||/6=|-5a+a|/6= 4a/6= 2a/3
When a ≤ 0
|-5a+|a||/6=|-5a-a|/6= -6a/6= -a

Please answer the simplification of (8a-3b) * (5a-2b)

（8a-3b）*（5a-2b）
=40a²-16ab-15ab+6b²
=40a²-31ab+6b²

How to simplify the formula 1034 + 78 + 320 + 102

1034+78+320+102
=> 1034 + 320 + (78 + 102)
=> 1034 + 320 + 180
=> 1034 + (320 + 180)
=> 1034 + 500
=> 1534