Evaluate the mathematical expression: (5.21 × 6.32) − 2.9272 =

Evaluate the square root expression: √(9 + 4√5) =

Simplify the expression: [9⁻² × 3⁵ × (5⁻²)³] / [(3⁻³)⁴ × 5⁴].

Simplify the decimal expression: (6.25 − 2.23) × (3.35 − 2.23) + (0.0016 − 2.987) =

Evaluate: [(2.1)³ + (5.8)³] / [(2.1)² - 2.1 × 5.8 + (5.8)²] =

Evaluate: (0.0203 × 2.92) / (0.0073 × 14.5 × 0.7).