MINI #49 - BASES AND POWERS Algebraic Expressions and Equations Number Theory Video by Art of Problem Solving's Richard Rusczyk.
MINI #81 - MORE COMPLEX ALGEBRAIC EQUATIONS Algebraic Expressions and Equations Video by Art of Problem Solving's Richard Rusczyk.
MINI #25 - SEQUENCES Algebraic Expressions and Equations Sequences, Series and Patterns Video by Art of Problem Solving's Richard Rusczyk.