yes, !! is also a math symbol
12:25
What Multiplication was like in the 1500s
24:00
The Subfactorial is Hilarious
13:33
Ancient trick to calculate ANY square root
14:03
Animation vs. Math
11:15
A simple equation that behaves weirdly - Numberphile
2:05
NEURO ENERGIZER REVIEWS (❌TRUTH❌) NEURO ENERGIZER REVIEWS CONSUMER REPORTS - Neuro Energizer Review
12:11
Simple Explanation of the Birthday Paradox
30:10