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((√3 + 2)² - (√5 + √2)²) (√10 + 2√3)
= ((7+4√3)-(7+2√10)) (√10+2√3)
= (4√3 - 2√10) (√10 + 2√3)
=4√30 + 24 - 20 - 4√30
= 4