Tính: \( \sqrt{8} + \sqrt{32} + \sqrt{72} \)

toán 9
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1. Tính:
a) \( \sqrt{8} + \sqrt{32} + \sqrt{72} \)

b) \( \sqrt{20} + \sqrt{45} - \sqrt{55} + \frac{\sqrt{3}}{\sqrt{11}} + \sqrt{\frac{5}{3}} \)

c) \( 3 \sqrt{27} + 3 \sqrt{-64} - 3 \sqrt{125} \)

d) \( \left( \frac{12}{\sqrt{5}+1} + \frac{4}{\sqrt{5}+2} \right) \cdot (10 + 3 \sqrt{5}) \)

e) \( \left( \frac{24}{\sqrt{7}+1} - \frac{3}{\sqrt{7}+2} \right) \cdot (4 - \sqrt{7}) \)

f) \( 3 \sqrt{8} + 3 \sqrt{-343} + 3 \sqrt{1000} \)