\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[latin2]{inputenc}
% \usepackage[magyar]{babel}
% \usepackage{times}

\usepackage{multirow}
\usepackage{array, fullpage, multicol}

\usepackage{textcomp}

\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{graphicx}


\begin{document}

\begin{center}
  \Large{11. Gyak. \\
  Parciális törtekre bontás}
\end{center}

\begin{enumerate}

 \item 
  \begin{enumerate}
   \item $\int \frac{x^4-3x^2}{1+x}$
   \item $\int \frac{x^3+4x^2+2}{2x^2-x}$
   \item $\int \frac{(1+x)^3}{1+x^2}$
   \item $\int \frac{x^4}{x+2}$
  \end{enumerate}

  \item 
  
   \begin{enumerate}
    \item $\int \frac{2}{(x-1)(x-3)}$
	\item $\int \frac{3}{x^2+x-2}$
	\item $\int \frac{2}{\left(x^2+1\right)\left(x^2+2\right)}$
	\item $\int \frac{1}{\left(x^2-2\right)\left(x^2+3\right)}$
	\item $\int \frac{x}{(x+2)(x+3)}$
	\item $\int \frac{x}{x^4+3x^2+2}$
	\item $\int \frac{3x^2+2x-4}{x^3-2x^2-5x+6}$
   \end{enumerate}
  
  \item
   \begin{enumerate}
    \item $\int \frac{x^2+x+1}{(x-1)^2 \cdot (x-2)}$
	\item * $\frac{x+1}{\left(x^2+1\right)^2 \cdot (x+1)^2}$
   \end{enumerate}

  \end{enumerate}
\end{document}
