√441 - 2³ × 5
√21² - (2 × 2 × 2) × 5
21 - (4 × 2) × 5
21 - 8 × 5
21 - 40
-19
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√441 - 2³ × 5
√21² - (2 × 2 × 2) × 5
21 - (4 × 2) × 5
21 - 8 × 5
21 - 40
-19