1.-11x+16y+2y
2. -5a+5a^2+12ab
3. -19x^2y+8xy^2+8x^2y^2
4. 23mn-4mn^3
5. 8r^2+22r
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Answers & Comments
1.-11x+16y+2y
2. -5a+5a^2+12ab
3. -19x^2y+8xy^2+8x^2y^2
4. 23mn-4mn^3
5. 8r^2+22r