Pillows: Doing some grade school Math with a pencil

File Details

Published: 2010-01-14 05:24:51.445018 Category: Other Type: Photo Model release: No

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Keywords

beta, calculate, calculating, formula, mathematic, mathematic, number, science, algebra, mathematical, mathematician, mathematic, school, scientific, student, study, symbol, symbol, instructing, teaching, theorem, theoretical, theory, grade, primary