Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6270827/test.pdf)
Configuration:
- Web browser and its version:chrome 89
- Operating system and its version:win10
- PDF.js version: 2.4/2.7/2.8 no working
- Is a browser extension: no 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/18545199/113852392-1ae26080-97cf-11eb-9dc9-0cecf52d267b.png)

What went wrong? (add screenshot)
![1617791294(1)](https://user-images.githubusercontent.com/18545199/113852355-10c06200-97cf-11eb-8672-598750f1093a.jpg)


console this log : **FormatError: TrueType Collection does not contain "DCWGQU+CambriaMath" font** 

any solution?thanks
var ttContext = {
          functionsDefined: [],
          functionsUsed: [],
          functionsStackDeltas: [],
          tooComplexToFollowFunctions: false,
          hintsValid: true,
        };
        if (fpgm) {
          sanitizeTTProgram(fpgm, ttContext);
        }
        if (prep) {
          sanitizeTTProgram(prep, ttContext);
        }
        if (fpgm) {
          checkInvalidFunctions(ttContext, maxFunctionDefs);
        }
        if (cvt && cvt.length & 1) {
          var cvtData = new Uint8Array(cvt.length + 1);
          cvtData.set(cvt.data);
          cvt.data = cvtData;
        }
        return ttContext.hintsValid;
      }
      
      font = new Stream(new Uint8Array(font.getBytes()));
      let header, tables;
      if (isTrueTypeCollectionFile(font)) {