Falls die Aufgabe so lautet:
f(x,y.z)=5 e^{6xy} +4x^2 y e^{12z}
df= d/dx(f(x,y,z)dx +d/dy f(x,y,z)dy +d/dz f(x,y,z)dz
d/dx= 8 x y e^{12 z} + 30 y e^{6 x y}
d/dy= 2 x (15 e^{6 x y} + 2 x e^{12 z})
d/dz =48 x^2 y e^{12 z}
->
df= d/dx(f(x,y,z)dx +d/dy f(x,y,z)dy +d/dz f(x,y,z)dz
df= (8 x y e^{12 z} + 30 y e^{6 x y}) dx + (2 x (15 e^{6 x y} + 2 x e^{12 z}))dy +(48 x^2 y e^{12 z}) dz