The megapov documentation says in the chapter 8.3.4. "Function pattern" that
these functions can be used: sin, cos, tan, radians, degrees, floor, ceil, pi.
  However, all the functions that can be used in an isosurface function can
be used here as well (eg. exp, atan and so on).
  Moreover, "pi" is cited as a function taking one argument, more precisely:

"pi - pi to the power of the argument"

  However, when trying to use "pi" as a function (eg. "pi(x)") an error
occurs (which isn't a big surprise).

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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