Without using tables, evaluate \((343)^{\frac{1}{3}} \times (0.14)^{-1} \times (25)^{-\frac{1}{2}}\)

Simplify 52.4 - 5.7 - 3.45 - 1.75

Simplify \((\sqrt{0.7} + \sqrt{70})^{2}\)

Evaluate: \(\frac{0.21 \times 0.072 \times 0.00054}{0.006 \times 1.68 \times 0.063}\)