a) 2x² - 5xy + 3 - 6xy -3x² - 7
-x² - 5xy + 3 - 6xy - 7
-x² -11xy + 3 -7
-x² - 11xy - 4
b) -5a³ + 6 + 7ab + 10a³ - 4ab - 3
5a³ + 6 + 7ab - 4ab - 3
5a³ + 3ab + 6 - 3
5a³ + 3ab + 3
c) 13x²y -6y + 5 - 4x + 11 + 3y - 4x²y
9x²y - 6y + 5 - 4x + 11 + 3y
9x²y - 3y + 5 - 4x + 11
9x²y - 3y + 16 - 4x
d) -7 + 5y³ + 10xy² - 2x³ + 4y³ - 3x²y + 3xy² + 4x²y
- 7 + 9y³ + 10xy² - 2x³ - 3x²y + 3xy² + 4x²y
- 7 + 9y³ + 13xy² - 2x³ - 3x²y + 4x²y
-7 + 9y³ + 13xy² - 2x³ + x²y
e) - 3a + 4a²b - 5 + 7ab - 3a²b + 11
-3a + a²b - 5 + 7ab + 11
-3a + a²b + 6 + 7ab
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a) 2x² - 5xy + 3 - 6xy -3x² - 7
-x² - 5xy + 3 - 6xy - 7
-x² -11xy + 3 -7
-x² - 11xy - 4
b) -5a³ + 6 + 7ab + 10a³ - 4ab - 3
5a³ + 6 + 7ab - 4ab - 3
5a³ + 3ab + 6 - 3
5a³ + 3ab + 3
c) 13x²y -6y + 5 - 4x + 11 + 3y - 4x²y
9x²y - 6y + 5 - 4x + 11 + 3y
9x²y - 3y + 5 - 4x + 11
9x²y - 3y + 16 - 4x
d) -7 + 5y³ + 10xy² - 2x³ + 4y³ - 3x²y + 3xy² + 4x²y
- 7 + 9y³ + 10xy² - 2x³ - 3x²y + 3xy² + 4x²y
- 7 + 9y³ + 13xy² - 2x³ - 3x²y + 4x²y
-7 + 9y³ + 13xy² - 2x³ + x²y
e) - 3a + 4a²b - 5 + 7ab - 3a²b + 11
-3a + a²b - 5 + 7ab + 11
-3a + a²b + 6 + 7ab