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x² + 2x² + 2 + 4
3x² + 6
2. (a² + 4a -1) - ( 2a² + 4a)
a² - 2a² + 4a - 4a - 1
a² - 1
3. -3(4 - 2q)
-12 + 6q
4. (5m - 1)(m + 4)
5m² + 20 m - m - 4
5m² + 19m -4