For the following questions answer them individually
$$7\frac{1}{7}-3\frac{1}{14}+2\frac{2}{7}=?$$
$$\frac{1}{5}\times\frac{5}{7}\div\frac{6}{7}=?$$
$$(5\times5 \times5 \times 5 \times 5 \times 5)^{2}$$ x $$(5 \times 5 \times 5 \times 5 )^{8}$$ ÷ $$(5\times5)^{3}$$ = $$25^?$$