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InfoBuyMath Challenged Algebra Add-On Kit
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InfoBuyTrig-Calculus Replacement Instruction Manual – UEB
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InfoBuyTrig-Calculus Replacement Instruction Manual – Nemeth
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Math Teaching Tool for Blind and Visually Impaired Students
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U.S. Patent 7,273,375
U.S. Patent 7,500,852
U.S. Patent 8,287,280