This document contains mathematical expressions and symbols. It appears to discuss properties of numbers that are even but not multiples of 10, as the line "SPICSA 2-12 even not 10" seems to indicate numbers that are between 2 and 12, are even, but not divisible by 10. However, the document provides very little context and is difficult to interpret with only the limited information given.

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4. SPICSA
2­12 even not 10
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