17:41

Second degree fractional equations - 1

21:24

Second degree fractional equations - 2

18:13

Rational Numbers - Summary Expressions 3

18:10

Algebraic fractions - conditions of existence - 4

7:21

Insieme complementare 2

11:49

Algebraic Fractions - Powers - 1

11:03

Algebraic fractions - conditions of existence - 3

12:43

Algebraic Fractions - Expressions with the Four Operations - 3