Attach (recommended) or Link to PDF file here: 

[anootation_problem.pdf](https://github.com/mozilla/pdf.js/files/7611701/anootation_problem.pdf)

Configuration:
- Web browser and its version: 98.0.4732.0 (Official Build) canary (64-bit)
- Operating system and its version: Edition Windows 10 Home, Version 20H2, OS build 19042.1348
- PDF.js version: 2.12.211
- Is a browser extension: Yes

Steps to reproduce the problem:
1. Open pdf file
2. Scroll to bottom of page and point to annotation of 'loss ft(x) >= 0,' text
3. Compare the displayed text with same in Acrobat Reader

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/2311076/143681452-0afa9a98-b16b-4a39-a393-631eb1c8c41f.png)

What went wrong? (add screenshot)
Text size not respected (e.g., in superscripts and subscripts)
![image](https://user-images.githubusercontent.com/2311076/143681575-2a2fe4de-cbad-4625-a6fe-2212fa20b8f1.png)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

`scaleX(${Math.max(0, Math.min(parseInt(value) / 100)).toFixed(2)})`,
  ],
  [
    "xfa-font-vertical-scale",
    value =>
      `scaleY(${Math.max(0, Math.min(parseInt(value) / 100)).toFixed(2)})`,
  ],
  ["xfa-spacerun", ""],
  ["xfa-tab-stops", ""],
  [
    "font-size",
    (value, original) => {
      value = original.fontSize = getMeasurement(value);
      return measureToString(0.99 * value);
    },
  ],
  ["letter-spacing", value => measureToString(getMeasurement(value))],
  ["line-height", value => measureToString(getMeasurement(value))],
  ["margin", value => measureToString(getMeasurement(value))],
  ["margin-bottom", value => measureToString(getMeasurement(value))],
  ["margin-left", value => measureToString(getMeasurement(value))],
  ["margin-right", value => measureToString(getMeasurement(value))],
  ["margin-top", value => measureToString(getMeasurement(value))],
  ["text-indent", value => measureToString(getMeasurement(value))],
  ["font-family", value => value],
]);
const spacesRegExp = /\s+/g;
const crlfRegExp = /[\r\n]+/g;
const crlfForRichTextRegExp = /\r\n?/g;
function mapStyle(styleStr, node) {