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$a > 0$

$a = 0$

$a \ne 0$

$a < 0$

${a^n}$         

${n^a}$

$na$

$a + n$

${a^{\dfrac{3}{2}}} = \sqrt {{a^3}}$          

${a^{\dfrac{3}{2}}} = \sqrt[3]{{{a^2}}}$

${a^{\dfrac{3}{2}}} = \sqrt[6]{a}$

${a^{\dfrac{3}{2}}} = \sqrt[3]{{{a^6}}}$

${a^{\dfrac{1}{{10}}}} = \sqrt[{10}]{a}$

${a^{\dfrac{1}{{10}}}} = \sqrt {{a^{10}}}$

${a^{\dfrac{1}{{10}}}} = {a^{10}}$

${a^{\dfrac{1}{{10}}}} = \sqrt[a]{{10}}$

${a^{545}} = {a^5}.{a^9}$

${a^{45}} = {a^5} + {a^9}$

${a^{45}} = {a^9}:{a^5}$

${a^{45}} = {\left( {{a^9}} \right)^5}$

${\left( {\sqrt 2  - 1} \right)^2} > 1$

${\left( {\sqrt 2  - 1} \right)^2} = 1$

${\left( {\sqrt 2  - 1} \right)^2} < 1$

${\left( {\sqrt 2  - 1} \right)^2} > 2$