Any-Size Matrix Determinant Oneliner - Golf'd

det = eval("'m:('r,d:('s,e:('o:sum(('c:('m,p:r('f,m,p:1if len(p)<2else-f(f,m[1:],p[1:p.index(m[0])]+[p[0]]+p[p.index(m[0])+1:])if m[0]-p[0]else f(f,m[1:],p[1:]),m,p))(o,c)*r('f,a:a[0]*f(f,a[1:])if a else 1,list(m[i+s*c[i]]for i in d(s))))(('m,i:r('f,m,i:('q:[m[i//q]]+f(f,m[:i//q]+m[i//q+1:],i%q))(e(len(m)-1))if m else[],m,i-1))(o,n+1))for n in d(e(s))))(list(d(s))))(int(len(m)**.5),'n:r('f,a:a*f(f,a-1)if a else 1,n)))('f,*a:f(f,*a),range)".replace("'","lambda "))