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4. Efectuați:

a. [tex]( \sqrt{2} ) ^{6} \times ( \frac{1}{2} )^{3} - ( \sqrt{ \frac{25}{2} } ) ^{6} \div ( \frac{5}{ \sqrt{2} } ) ^{4} \times \sqrt{ \frac{16}{25} } [/tex]

URGENT!!! DAU COROANĂ!!!!