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calculați

a) √5³•5

b)√7⁴•4

c)√3⁴•5²•36

d)√144•3²•64

e)√21²•23²

f)√9²-6²+2²

g)√64²-63²+4²+1²

h)√2⁶•(7²-2⁴•6²)

i)√5•(9²-6²)

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