add:xy2z2 + 3x2y2z–4x2yz2,-9x2y2z + 3xy2z2 + x2yz2
add:xy2z2 + 3x2y2z–4x2yz2,-9x2y2z + 3xy2z2 + x2yz2
the addition is as follows:the result is as follows 4xy2z2-6x2y2z-3x2yz2
the addition is as follows:the result is as follows 4xy2z2-6x2y2z-3x2yz2