Realiza tus Graficas en LaTeX, con el paquete Tikz.
Graficas de funciones, utilizando unicamente LaTeX.

\documentclass{article}
% Autor: Favian Arenas
% farenasenator@gmail.com
% 2021-06-25
\usepackage{tikz,pgfplots}
\pgfplotsset{compat=newest}
\begin{document}
\begin{figure}[h!]
  \centering
  \begin{tikzpicture}[scale=1.2]
  \begin{axis}[xmin=-5,xmax=5,ymin=-5,ymax=5,axis x line=center,axis y line=center,xlabel=$x$, 
  ylabel=$y$,xlabel style={at={(ticklabel* cs:1.05)}},
  ylabel style={at={(ticklabel* cs:1.05)}}, ]
  \addplot[red!80!white,thick, samples=200,domain=-3:3]{x^4-0.5*x^3-2*x^2-x+1};
  \node at (axis cs:3,3){$p(x)$}; 
  \end{axis}
  \end{tikzpicture} 
  \caption{Funcion $p(x)=x^4-0.5x^3-2x^2-x+1$}
\end{figure}

\end{document}