diff --git a/tests/math_test.ipynb b/tests/math_test.ipynb
new file mode 100644
index 0000000..7de61f1
--- /dev/null
+++ b/tests/math_test.ipynb
@@ -0,0 +1,108 @@
+{
+ "cells": [
+ {
+ "cell_type": "code",
+ "execution_count": 9,
+ "metadata": {},
+ "outputs": [],
+ "source": [
+ "from sympy import Matrix\n",
+ "from Slides import math_helper as mh"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 10,
+ "metadata": {},
+ "outputs": [
+ {
+ "data": {
+ "image/png": "iVBORw0KGgoAAAANSUhEUgAAAFAAAAA9CAIAAAC1GXl+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAADzklEQVRo3u2bPXKjMBiG8Q5tZgRHEDkBqE0HmXRpwEcQOYGkIwA3sI5g+wCZQJcWfAPTpRW6gbfQLsNim3hxbGOGt/Ifkh4kfXx6JWu7qwtjrDUEALhcXQCAZl0YY127hTDGhJArVJTnef06SRJN037dBBgAYDVUf56mqWVZcRz3LjlNU8/zttutetusRfX2bYAPKo5jKaXv+4yx1WrVA9WyrOfn5yzLOn42FOA0TYUQQRDEcez7fmuenyLVsWqmmKY5dGDGGGOsfi2lTNO0RzkIoe4fDAK4qipN0wzDUG8dx4EQbjabS9Q1COAsy1qD0HXdsixHCyyEEEI0P4EQth6howLWNG2/PzsCz90DQwillGom1/y+7/cbLHcA7HmepmlRFDXb3UxIflD6QIa07/tJkiCEIISc8/oRNVpgznlZlvP53LbtKIocx+ldlG3bdwBsGEZRFOeXE4ZhGIZ3EKWvpgl4Ap6AJ+AJ+D6Ai6JQDzHP8xzHoZQ2k9ur+R5NR6rH5Y7jzGazjkL+JB6U0rIsayepqiqEUJZlP5IMnNjWt7e3c9bAi8VCSsk5z7KMMTafzw83frfbEUJs2245unmeE0Iu5EsfK1k5UkKIHsU2r3JdV6G1CscY61VVJUmyXC5bN8JxnHMS2n761pHqTk6b6XTTkf5nDitTU92S0UitQw7PYTVtmrenW9/O6uuPi31tNptjPax/axG01G1zAwBuDhzHMSHkWBfqEELVbyc2lFI65MFcFEWWZR2etq7ixHK5vFrPPD09PTw8HPzqf4fbvhhj+wFY6eXl5evrS1eud5IkGONTbKQgCDq+NU1zsVh0l/D5+QkAeH19/fFb6XleFEXHBvP7+7uUUlfdixBCCHHOFc92u+Wcu66r7LWmemxzXUeq5Xme1+HKNM397tFVXBVCqN0d5SohhAghF/INz3GkOiLLer1uxVSM8T7wbLfbXRkpDEMAwDmbwP1EKZVSTsvDCXgCnoAn4Al4Ar6Mp7VarSzLms1mHfnvgI4tnXLKqkMqh//4+IiiaL1eH0tshgJ84imr7gQuCALLsiiltm0fW3gNa0if42k1VZblMdNqhEErDEPG2P46b4TAlFLDMCCEHQdiRgUcx3Ge50KIx8fHY+cAxjak1eljQgjn/KDBOizg8z0tJWVKHyxtPD3cOtd2LOb/Gs3srZ9DVVUp7/Kgm6cPren9PC3f9/M8tyxLXd7hOg8L+NtTVh2x6kQ7dVotTcAT8AT8/0qSZPZXp29N95BhGHVF6p9pN9h5qKqqlQNdbk+nZZ6YpvkbaxdH7shB9ysAAAAASUVORK5CYII=\n",
+ "image/svg+xml": [
+ "\n",
+ "\n",
+ ""
+ ],
+ "text/latex": [
+ "$\\displaystyle C = \\displaystyle \\left[\\begin{matrix}0 & 1\\\\1 & 2\\\\1 & 3\\end{matrix}\\right]$"
+ ],
+ "text/plain": [
+ ""
+ ]
+ },
+ "metadata": {},
+ "output_type": "display_data"
+ }
+ ],
+ "source": [
+ "conn = Matrix([\n",
+ " [0, 1],\n",
+ " [1, 2],\n",
+ " [1, 3]\n",
+ "])\n",
+ "mh.print_latex('C = {0}', conn)"
+ ]
+ }
+ ],
+ "metadata": {
+ "kernelspec": {
+ "display_name": "Python 3",
+ "language": "python",
+ "name": "python3"
+ },
+ "language_info": {
+ "codemirror_mode": {
+ "name": "ipython",
+ "version": 3
+ },
+ "file_extension": ".py",
+ "mimetype": "text/x-python",
+ "name": "python",
+ "nbconvert_exporter": "python",
+ "pygments_lexer": "ipython3",
+ "version": "3.8.3"
+ },
+ "toc": {
+ "base_numbering": 1,
+ "nav_menu": {},
+ "number_sections": true,
+ "sideBar": true,
+ "skip_h1_title": false,
+ "title_cell": "Table of Contents",
+ "title_sidebar": "Contents",
+ "toc_cell": false,
+ "toc_position": {},
+ "toc_section_display": true,
+ "toc_window_display": false
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
diff --git a/tests/test_math_helper.py b/tests/test_math_helper.py
index 9f2ba52..b5016ad 100644
--- a/tests/test_math_helper.py
+++ b/tests/test_math_helper.py
@@ -1,12 +1,13 @@
#!/bin/env python3
# -*- coding: utf-8 -*-
from Slides import math_helper as mh
import numpy as np
from sympy import Matrix
def test_print_colored_matrix():
+ mh.init_printing()
a = Matrix(np.zeros((2, 2)))
a = mh.ColoredMatrix(a)
mh.print_latex('{0}', a)