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Euler's Identity T-Shirt
Sale Price $40.42. Original Price $47.55.
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"Tau is the new Pi" T-Shirt
Sale Price $38.64. Original Price $45.45.
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Tau is the new Pi
Sale Price $6.35. Original Price $7.05.
Tau is the new Pi Coffee Mug
Price$32.95
Tau is the new Pi Tie
Price$64.70
T-Rex Detector Mug
Price$32.95