document.write( "Question 267348: how many combinations can u arrange 7 books on a shelf
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Algebra.Com's Answer #196235 by Alan3354(69443)\"\" \"About 
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The 1st is 1 of 7
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\n" ); document.write( "--> 7*6*5*4*3*2*1
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\n" ); document.write( "That's 7! \"7 factorial\"
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