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F
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Practice
N
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(
2
,
3
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4
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5
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6
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8
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1
0
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1
2
)
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d
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(
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x
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)
(
2
,
3
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4
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5
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6
,
8
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1
0
,
1
2
)
M
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C
x
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(
2
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3
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4
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5
,
6
,
8
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1
0
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1
2
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2
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