How to make all math in document significantly smaller?

Question

I am creating a cheatsheet for an upcoming test, so far everything seems to be going fine (using a multicols layout).

However, the fonts themselves seem to be too large, which makes the sheet too long.

I managed to make the actual text smaller using the following question: How to make font smaller than 4pt?

However, now I'm faced with a limit on how small the math itself can be.

Making the text smaller using the aforementioned methods does not affect the size of equations and verbatim symbols, and my naive approach of putting down a global \tiny symbol makes the math look weird and almost unreadable.

I would very much appreciate an adequare solution! My goal is to scale down strictly the verbatim math / equations in a document to a relatively small size, in an efficient manner.

Answer 1

default (\tiny)

smaller (\tiny with 4pt math 3pt scripts and 2pt subsubscripts)

\documentclass{article}

\usepackage{lmodern}
%\tiny is 5pt
%  \DeclareMathSizes{5}{5}{5}{5}
 \DeclareMathSizes{5}{4}{3}{2}
\DeclareFontFamily{OMX}{lmex}{}
\DeclareFontShape{OMX}{lmex}{m}{n}{%
   <->lmex10% not fixed sfixed*lmex10%
   }{}

\begin{document}

\tiny 
One $\frac{a^2}{b^2}+x_1 + \int_0^n f(x) dx$ two three
four $\sqrt{x_{y_2}}$ five
\end{document}

Answer 2

You could try to use extarticle with 8pt document option or a use custom font size. I applied the latter in the example below. You might want to try different fonts as well; I think newtx does not look bad.

\documentclass{article}
\usepackage{newtxtext,newtxmath}
\usepackage{titlesec}
\usepackage{blindtext}
\titleformat*{\section}{\fontsize{8pt}{10pt}\selectfont\bfseries}
\titleformat*{\subsection}{\fontsize{7pt}{9pt}\selectfont\bfseries}
\titleformat*{\subsubsection}{\fontsize{6pt}{7pt}\selectfont\bfseries}
\titleformat*{\paragraph}{\fontsize{6pt}{7pt}\selectfont\bfseries}
\begin{document}
\fontsize{5pt}{6pt}\selectfont
\blindmathtrue
\Blinddocument
\end{document}