Katherine is invited to solve the algebra problem on the board at school and exceeds her teacher's expectations. The teachers encourage her parents to enroll her in a more challenging school because of her precocious abilities in math.
The math club illustrates how to use the distributive property in reverse through factoring. As the members of the club explain, this technique can be used to check your work when utilizing the distributive property.
Finn tries to impress Princess Bubblegum with a bubble blower capable of blowing bubbles in different dimensions. Unfortunately, a 4th-dimensional bubble means a black hole.
After helping Josie with her car, Aldys asks her if she'd be interested in joining a student group called The Denominators. Josie joins the group, and a song that lists some multiples of the number 3 is played.