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Link: http://codepad.org/0uub2zLq    [ raw code | output | fork ]

Ruby, pasted on Jul 12: 
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4.times {|selfRow|

    4.times{|i|
        col = i+1
        row = i+1
        print "m1._#{selfRow+1}#{col} * m2._#{row}2  +  "
    }
    puts "\n"
}


Output: 
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m1._11 * m2._12  +  m1._12 * m2._22  +  m1._13 * m2._32  +  m1._14 * m2._42  +  
m1._21 * m2._12  +  m1._22 * m2._22  +  m1._23 * m2._32  +  m1._24 * m2._42  +  
m1._31 * m2._12  +  m1._32 * m2._22  +  m1._33 * m2._32  +  m1._34 * m2._42  +  
m1._41 * m2._12  +  m1._42 * m2._22  +  m1._43 * m2._32  +  m1._44 * m2._42  +


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