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.
Mas, se não fosse pelo Sr. Euler, que escreveu quase 70 volumes de matemática e tinha 13 filhos, que aparentemente ele balançava no joelho enquanto escrevia, se não fosse por ele, talvez não existissem estas invariantes.