[Tex/LaTex] How to make math symbols bigger

fontsizemath-modescalingsymbols

Is there a way to make math symbols bigger?

Reason: I've used \sfrac{q}{m}, and those symbols appear far to small, so I would like to make them a bit bigger.

edit: I just thought that \sfrac{q}{m} should look nicer if it is bigger when it is followed by =.

edit 2: Context:

some text
\[
  \dfrac{q}{m} \propto \frac{4\pi{r^2}}{\frac{4}{3}\pi{r^3}}\
  \propto 3{r^\alpha}\text{, \quad gdje je\quad}\;\alpha = -1 \text{.}
\]
some text

Best Answer

Another possibility are the \mathlarger and \mathsmaller commands provided by the relsize package.

These can be iterated to make bigger and bigger

 \documentclass{article}
 \usepackage{relsize}
 \begin{document}
 \[
    x+y=z \leftrightarrow \mathlarger{\mathlarger{\mathlarger{(x+y=z)}}}
 \]
 \end{document}

alt text

It doesn't always work well with large operators, though.

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