Terms of Service
Last Updated: June 22, 2026
1. Terms Acceptance
By accessing and using this website, you agree to comply with and be bound by the following Terms of Service. If you do not agree to these terms, please do not download our files or place physical textbook orders.
2. Resource Downloads & License
The PDF edition of Mathematical Supplements is offered for free for personal, educational, and non-commercial study use.
- You may not sell, commercially exploit, or redistribute the PDF guidebook or individual pages for financial gain.
- You may share link URLs pointing back to this website for others to download their own copies.
3. Physical Book Purchase & Fulfillment
Physical paperback guidebook orders are subject to stock availability and manual payment matching.
- Pricing: Books are sold at 10 SGD each, inclusive of shipping in Singapore. We reserve the right to modify prices or print allocations at any time.
- Payment: We accept payment via manual PayNow transfers only. Orders are not considered final or confirmed until we manually verify the transfer match to your reference transaction code.
- Delivery: Shipments are limited to Singapore addresses. We aim to fulfill and deliver orders within 1 to 3 working days, but do not guarantee delivery dates.
4. Disclaimer of Warranties
The guidebook materials, formulas, shortcuts, and solutions are provided "as is" for educational reference. While the author strives for academic accuracy, we make no guarantees regarding complete error-free math contents, syllabus coverage, or performance results in formal J1/J2 examinations.
5. Limitation of Liability
Under no circumstances shall the author or website administrators be held liable for any direct, indirect, or incidental academic or financial damages resulting from the use of or inability to use materials on this site.
Contact Information
If you have any questions about these Terms, please contact:
Administrator: Yang Xu
Email: yangxu624@gmail.com