Title: De multiplici integrali definito [integral from -[infinity] to [infinity]] ... [integral from -[infinity] to [infinity]e([sum from 1 to n][sum from 1 to n]a[mu]₁[nu]X[̳m̳u̳]̳X[̳n̳u̳]̳ + [sum from 1 to n]b[mu]X[̳m̳u̳]̳ +c)[square root of minus one]dx₁dx₂ ... dxn̳ .