Which of these mathematical products faced a major recall in 2010-2011 due to calculation errors that affected over 500,000 units?

Mathematical products and tools are essential for education and professional use, but even in this precise field, product recalls happen. This poll tests your knowledge of one of the most infamous product recalls in the mathematics industry, which had significant financial and educational implications. Can you identify which mathematical product faced a massive recall due to fundamental calculation errors?

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Texas Instruments TI-84 Plus Silver Edition calculators with erroneous logarithm calculations
Casio FX-991EX scientific calculators with faulty matrix operations
HP Prime graphing calculators with incorrect integral solutions
Sharp EL-W535 scientific calculators with flawed statistical functions