But if it wasn't for Mr. Euler -- who wrote almost 70 volumes of mathematics and had 13 children, who he apparently would dandle on his knee while he was writing -- if it wasn't for Mr. Euler, there wouldn't perhaps be these invariants.
Ali da nije bilo g.Eulera -- koji je napisao gotovo 70 djela o matematici i imao 13 djece, koje je navodno njihao na koljenima dok je pisao -- da nije bilo g.Eulera, vjerojatno ne bi bilo ovih invarijanti.