4:54

Aggvent Calendar Day 30

6:53

Aggvent Calendar Day 29

12:01

a+b+c+d+e = abcde

4:55

Calendario de Aggvent, día 5

8:31

The Intuitive Concept of a Derivative

8:51

Encuentra la derivada: El Derivímetro de Ott (años 1930)

4:58

4 Squares 1 Circle

9:16

What is the value of this sum?