Simplify $: 5 \sqrt{2}+2 \sqrt{8}-3 \sqrt{32}+4 \sqrt{128}$
Rationalise the denominator of the following:
$\frac{3 \sqrt{5}+\sqrt{3}}{\sqrt{5}-\sqrt{3}}$
Fill in the blanks so as to make each of the following statements true (Final answer only)
$(729)^{\frac{1}{3}}=\ldots \ldots$
Find the value
$(625)^{-\frac{3}{4}}$
Which of the following is irrational?