Any good alternatives to Inverse Symbolic Calculator?

Inverse Symbolic Calculator (ISC for short) is down https://isc.carma.newcastle.edu.au/ :-( What would you use instead of this resource now? Wolfram alpha can give answers in simple cases, but from my experience ISC was much more useful. What to do now?

• The "original ISC" (as linked from the ISC page) still works. – Blue Jun 4 at 19:08
• Use full Mathematica. – David G. Stork Jun 4 at 19:23
• @DavidG.Stork. I am not a Mathematica user but, when I go to university, I can use it. Could you show me the syntax to be used for this purpose ? Thanks. – Claude Leibovici Jul 24 at 4:55
• For example: InverseFunction[Sin] gives ArcSin – David G. Stork Jul 24 at 6:06