5a² + 2ab + 7b² - 30
5ab - (-27b)² + 45
-26a² + ab - 36a²
-21a² - 8ab + 2b² + 15
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5a² + 2ab + 7b² - 30
5ab - (-27b)² + 45
-26a² + ab - 36a²
-21a² - 8ab + 2b² + 15