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Discover tools from different categories to expand your toolkit beyond Math.

Compare the total cost of renting versus buying a home with opportunity cost and appreciation analysis

Check DNS records (A, MX, CNAME, etc.) with our free DNS lookup tool. Fast and reliable DNS record checker for domain diagnostics.

View the night sky with stars, constellations, and celestial objects from your location. Interactive star map for stargazing and astronomy.

Remove duplicate lines from text with this free online tool. Clean up lists and text data quickly.