_:n2eb88ff14a124389bb6789043653e556xb1
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://it.symbolab.com/solver/step-by-step/%5Ccos+%28%5Cfrac%7B%5Cpi+%7D%7B4%7D%2B%5Cfrac%7B%5Cpi+%7D%7B3%7D%29>