We value your feedback and read every message. Whether you’re exploring combinatorics for the first time or you use it regularly in academics or work, we’re here to help
you get the most from the Visual Combinatorics Calculator.
Owned and conceived by Sonali Khandelwal, and Developed and Maintained
by Softusvista, our goal is to make
combinatorics visual, interactive, and easy to understand for everyone.
How we can help?
Product support
Confused by a result? Send us your inputs and we’ll help you interpret what you’re seeing.
Feature requests
Tell us what would make combinatorics easier—new visualizations, export options, or custom calculation modes.
Report a bug
If something looks off, please include steps to reproduce so we can fix it quickly.
Data or calculation feedback
Found an edge case or scenario we should support (special permutation types, multiset cases, etc.)? Share details.
Partnerships and press
For collaborations, research, academic use, or media coverage.
General questions
Anything else related to Visual Combinatorics Calculator.
Contact form
Use the form below and we’ll get back to you.
Fields: Name, Email, Subject, Message, Page URL, Device/Browser, Optional Screenshot link.
Please feel free to Contact here.
Privacy and data
Your privacy matters. We do not store your calculator inputs on our servers, and the tool does not require sign-up.
Please do not share sensitive information in your message. For details, see our Privacy Policy.
Who you’ll reach?
Owner: Sonali Khandelwal
City, State, Country: Fremont, California, USA
Publisher: Softusvista Inc
(We’ll route your message to the right person—product support, engineering, or the founder—based on your subject.)
What to include in your message (to speed things up)
- The calculator or page you were using (paste the URL)
- Your inputs (values for permutations/combinations, sets, repetitions, etc.)
- What you expected vs. what you observed
- Device and browser (e.g., Windows 10 – Chrome)
- Screenshots (optional but helpful)
Response time
We aim to reply as soon as possible. If volume is high, it may take a little longer, but we read every message.
Important note (no academic or legal advice)
Visual Combinatorics Calculator is an educational tool. We don’t provide personalized academic, legal, or professional advice. Please consult a qualified professional for decisions specific to your situation. See our Disclaimer and Terms of Use.
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