3x² + 4x² – 5x² =
– x³ + 5x – 2x + 3x³ + x + 2x³ =
– 2x⁴ + 6x⁴ + 3x⁴ – 5x⁴ =
2y² + 5y² – 3y² =
6x³ – 2x³ + 3x³ =
7xy²z – 2xy²z + xy²z – 6xy²z =
2a⁶ – 3a⁶ – 2a⁶ + a⁶ =
4x³+4x
7x³
4x²
-2x⁶
0
2x⁴
2x²
