1) -5.7x³ - 7ay²
2) 2,11a²z - 11,8y²
3) 20ab + 3,6m³
4) 39,2x² + 61,1kt
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Answers & Comments
1) -5.7x³ - 7ay²
2) 2,11a²z - 11,8y²
3) 20ab + 3,6m³
4) 39,2x² + 61,1kt