Somebody please help me. This Odysseyware program is really stressing me out. :'(
1. Find the sum of (5x3 + 3x2 - 5x + 4) and (8x3 -5x2 + 8x + 9).
2. Add: 2a3 + 5a - 7 and 5a2 - 6a + 12
3. Subtract: 11a2 + 42a - 6 from 14a 2 - 24a + 7.
4. (-6.7x 2 + 2.3x y + 5.2) - (-14.9x 2 - 3.5x y + 7.1)

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did you try google

Yes and I cant find any math website that can help me with them.

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