LaTeX multicols and small math symbols

Question

TeX

Faced such a problem. There is this TeX code:

\begin{problem}
  Найдите пределы следующих функций (или докажите, что предела не существует):
  \begin{multicols}{2}
    \begin{enumerate}
      \item $\lim\limits_{z \to i}{\frac{3z^4 - 2z^3 + 8z^2 - 2z + 5}{z -i}}$
      \item $\lim\limits_{z \to 1}{f(z)}$, $f(z) = \begin{cases}z^2, z \neq 1\\0, z = 1\end{cases}$
      \item $\lim\limits_{z \to i}{\frac{z^2}{z - i}}$
      \item $\lim\limits_{z \to \infty}{\frac{z-2i}{z+i}}$
      \item $\lim\limits_{z \to \infty}{\frac{z^2+1}{z-2i}}$
      \item $\lim\limits_{z \to i}{\frac{z^2 + 1}{z^4 - 1}}$
      \item $\lim\limits_{z \to 1-i}{\overline{z}}$
      \item $\lim\limits_{z \to -1}{\arg{z}}$
      \item $\lim\limits_{z \to 0}{\frac{z}{\overline{z}}}$
      \item $\lim\limits_{z \to 0}{\frac{\left(\mathrm{Re}z\right)^2}{\mathrm{Im}z}}$
      \item $\lim\limits_{z \to 1+i}{z^2 - 5z + 10}$
      \item $\lim\limits_{z \to -2i}{\frac{\left(2z+3\right)\left(z-1\right)}{z^2 - 2z + 4}}$
    \end{enumerate}
  \end{multicols}
\end{problem}

Which results in a two-column (in this case) description of task options. However, the formulas in these columns are greatly scaled and become, firstly, ugly, and secondly, difficult to read. Is there a way to make TeX treat the insides of items as extension formulas, while remaining within the scope of the item?

Answer 1

Do you want it to be like this?

Add to preamble

\everymath{\displaystyle}