Star vs. the Forces of Evil (2015)

S2E32 Mathmagic

Star's reluctance to tackle a math problem in class leads her to discover that dodging her most disliked subject could have far-reaching consequences. As she grapples with her aversion, she uncovers a surprising connection between math and the universe, prompting her to rethink her approach to the subject. Through this journey, Star realizes that embracing challenges can unlock unexpected powers and insights.