paragraph_text: <tr><th style="background: white">Operacija <th style="background: white">Kartezijeve koordinate (x,y,z) <th style="background: white">Cilindrične koordinate (ρ,φ,z) <th style="background: white">Sferne koordinate (r,ϑ,φ) <th style="background: white">Parabolične koordinate (σ,τ,z)