Study Smarter. Stress Less.
Quick access to the formulas you actually use.
Math QRH puts the formulas, identities, and concepts you actually use in one place.
No digging through textbooks.
No flipping between ten tabs.
✔ Find What You Need Fast
Formulas, steps, and key concepts that are easy to locate when you get stuck.
✔ From Algebra II to Calculus III
Everything you will see in class, organized clearly.
✔ Better Test Prep
Review before quizzes, exams, or standardized tests without rereading entire chapters.
✔ Less Stress, More Clarity
Straightforward explanations. Clean formatting. No fluff.
✔ Study Your Way
Use it for homework help, quick refreshers, or full exam review.
Whether you are cramming before a test or trying to finally understand that one topic that will not click, Math QRH is built to help.
About The Author
Built by a Student, for Students
Katarina Costa is a senior at Stanford University majoring in Mathematics. Her academic path started early. She completed her Associate of Science while still in high school and continued into advanced undergraduate math, all while serving as a team captain for Stanford Cheer.
But if you ask her, she’ll tell you she’s not an “expert.” She’s just someone who has spent a lot of time practicing, asking questions, and figuring out what actually helps when math gets overwhelming.
Katarina created Math QRH as a practical, no-fluff reference for students working through Algebra II to Calculus III. She believes success in math isn’t about being a genius. It’s about consistency, structure, and having the right tools when you need them.
After graduation, she will join the Data and Intelligence team at a fixed-income trading fintech firm.