determinant method

double determinant()

Implementation

double determinant() =>
   m12*m9*m6*m3 -  m8*m13*m6*m3 - m12*m5*m10*m3 + m4*m13*m10*m3 +
   m8*m5*m14*m3 -  m4*m9*m14*m3 -  m12*m9*m2*m7 +  m8*m13*m2*m7 +
  m12*m1*m10*m7 - m0*m13*m10*m7 -  m8*m1*m14*m7 +  m0*m9*m14*m7 +
  m12*m5*m2*m11 - m4*m13*m2*m11 - m12*m1*m6*m11 + m0*m13*m6*m11 +
  m4*m1*m14*m11 - m0*m5*m14*m11 -  m8*m5*m2*m15 +  m4*m9*m2*m15 +
   m8*m1*m6*m15 -  m0*m9*m6*m15 - m4*m1*m10*m15 + m0*m5*m10*m15;