This is default text.
This is bold…
…and this is italic.
This is what they look like together.
~~This is strikethrough text.~~
This text is highlighted.
Superscripts¹ and subscripts_xyz

This is default text.
<strong>This is bold...</strong>
<em>...and this is italic.</em>
<strong><em>This is what they look like together.</em></strong>
<del>This is strikethrough text.</del>
<mark>This text is highlighted.</mark>
Superscripts<sup>1</sup> and subscripts<sub>xyz</sub>

You can use utility classes to adjust the size and color.