Which of these mathematics product launches was a famous retail failure that lost over $100 million in development and marketing costs?

Throughout history, several major retailers have attempted to launch specialized mathematics product lines - from advanced calculators to geometric modeling tools. Some became industry standards, while others disappeared quickly from the market. Test your knowledge about these notable retail failures in the mathematics product space!

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Texas Instruments' TI-92 3D graphing calculator (1995)
Casio's 'Equation Solver' standalone device (2003)
Microsoft Mathematics Suite retail software (2010)
HP's TouchMath tablet with stylus interface (2008)