-- -*- M2-comint -*- {* hash: 1559538581 *}

i1 : R = QQ[x,y,z];

i2 : f = matrix{{x^2-y*z, x*y*z + z^4}, {x-1, 2*y^2+z^2-1}}

o2 = | x2-yz z4+xyz   |
     | x-1   2y2+z2-1 |

             2       2
o2 : Matrix R  <--- R

i3 : diff(x,f)

o3 = | 2x yz |
     | 1  0  |

             2       2
o3 : Matrix R  <--- R

i4 : diff(x^2-y*z,f)

o4 = | 3 -x |
     | 0 0  |

             2       2
o4 : Matrix R  <--- R

i5 :