I am writing a thesis and I began write as a article. I thought it is easy convert to beamer. Now I have some problems. In equnarray and $, parenthesis, bracket and \bigoplus don't seem.
\documentclass[12pt]{beamer}
\usefonttheme{professionalfonts}
\usepackage{siunitx}
\usepackage{newtxtext,newtxmath}
\usepackage{bm}
\mode<presentation>{\usefonttheme{professionalfonts}}
\usepackage[turkish]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage[loadonly]{enumitem}
\usepackage[shortlabels]{enumerate}
\newcommand*\circled[1]{\tikz[baseline=(char.base)]{
\node[shape=circle,draw,inner sep=2pt] (char) {#1};}}
\usepackage{mathptmx}
\begin{document}
\begin{eqnarray*}
x\bigoplus y=max\left\{x,y\right\}\\
x\bigotimes y=x+y
\end{eqnarray*}
\end{document}




enumeratepackage with the option[shortlabels](it clashes withTikZpackage). – Budo Zindovic Dec 19 '16 at 14:52\usefonttheme{professionalfonts}. By the way your "max" is a function so you should\DeclareMathOperator\max{max}– Chris H Dec 19 '16 at 14:53