Add:xy2z2 + 3x2y2z–4x2yz2,-9x2y2z + 3xy2z2 + x2yz2

The addition is as follows:The result is as follows 4xy2z2-6x2y2z-3x2yz2

Q81 of 128 Page 224

Add:
xy²z² + 3x²y²z–4x²yz²,-9x²y²z + 3xy²z² + x²yz²

The addition is as follows:

The result is as follows 4xy²z²-6x²y²z-3x²yz²

Add:

7a²bc, -3abc², 3a²bc, 2abc²

Add:

9ax, + 3by – cz, -5by + ax + 3cz

Add:

5x² – 3xy + 4y² – 9, 7y² + 5xy – 2x² + 13

Add:

2p⁴ – 3p³ + p² – 5p + 7, -3p⁴-7p³-3p²-p-12