<https://ru.coursera.org/lecture/exploratory-data-analysis-matlab/basic-mathematical-operations-s8anG#lecture>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/VideoObject>
<https://ru.coursera.org/lecture/exploratory-data-analysis-matlab/basic-mathematical-operations-s8anG>