_:ncecd8f0818a44440bdbdf9a1f4ccff42xb1
<http://schema.org/item>
"https://www.symbolab.com/solver/step-by-step"
<https://it.symbolab.com/solver/step-by-step/%5Cint+%5Cint+%5Cint+x%5E2%2By%5E2%2Bz%5E2dxdydz>