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Euler's Identity T-Shirt
Sale Price $42.80. Original Price $47.55.
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"Tau is the new Pi" T-Shirt
Sale Price $40.91. Original Price $45.45.
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Tau is the new Pi Coffee Mug
Sale Price $29.66. Original Price $32.95.
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Tau is the new Pi
Sale Price $6.35. Original Price $7.05.
Tau is the new Pi Tie
Price$64.70
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T-Rex Detector Mug
Sale Price $29.66. Original Price $32.95.