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(-7)² - (-4)² = 49 - 16 = 33
(-57)² - 54² = 3249 - 2916 = 333
(-8)² - (-3)² = 64 - 9 = 55
(-58)² - (-53)² = 3364 - 2809 = 555
- 5² - (-5)² = - 25 - 25 = - 50