blackboard Archives - Cotton Expressions

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The Part I Hate T-Shirt $25.74 – $26.81
Color
Ash
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Small Medium Large X-Large XX-Large +$1.00
Scientific geniuses are human, too. This t-shirt is for everyone who remembers what it was like to solve a problem at the blackboard.
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You Want Proof T-Shirt $25.74 – $26.81
Color
Ash
Size
Small Medium Large X-Large XX-Large +$1.00
Featured on the cover of Sidney Harris’s You Want Proof book of science cartoons.
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Add/Subtract T-Shirt $25.74 – $26.81
Color
Ash
Size
Small Medium Large X-Large XX-Large +$1.00
How mathematicians unwind.