message: remove \tag since MathJax can not treat both \tag and \label at the same time.
diff: @@ -201,7 +201,8 @@ export class MathPreview {
  }
  replaceLabelWithTag(tex: string, refLabel?: string, tag?: string): string {
  - let newTex = tex.replace(/\\label\{(.*?)\}/g, (_matchString, matchLabel, _offset, _s) => {
  + const texWithoutTag = tex.replace(/\\tag\{(\{[^{}]*?\}|.)*?\}/g, '')
  + let newTex = texWithoutTag.replace(/\\label\{(.*?)\}/g, (_matchString, matchLabel, _offset, _s) => {
  if (refLabel) {
  if (refLabel === matchLabel) {
  if (tag) {
  