Is there a freeware (or nominal) online web resource for graphing and surface plotting?

Question

Programming

Good afternoon.
It is necessary to specify the area of ​​the arguments, the function (if possible using the most common functions - trigonometry, ln, sums, products ...), grid spacing, etc.
To additionally be possible:
1) Display several graphs/surfaces in one window
2) Display arguments and value in a tabular (or csv, etc.) form with the initial setting of the argument step.
3) If the possibilities of scaling, rotation, etc. are implemented. output transformations in the window would be great.
4) The language would be better Russian / English.
Thanks in advance.

Answer 1

• Obvious Wolframalpha (points 1, 2, 3 in the paid version).
  
• For simple 2D plots, I use fooplot.com (an example with a family of functions on one plot). What is characteristic is that the URL always contains a current link to the current document (it is updated with any change), the document itself is not stored on the server, but is fully defined in the link itself.
  

Answer 2

maxima-online.org is not only graphics, but a computer algebra system in general. And the syntax is not as stubborn as that of wolfram-alpha.