a) (\(\frac{3}{7}\)+\(\frac{1}{2}\))2=(\(\frac{3}{7}\))2+2x\(\frac{3}{7}\)x\(\frac{1}{2}\)+(\(\frac{1}{2}\))2=\(\frac{9}{49}\)+\(\frac{3}{7}\)+\(\frac{1}{4}\)=169/196
b)(3/4-5/6)2=3/42-2x3/4x5/6+5/62=9/16-5/4+25/36=1/144
c)54.204/255.45=625x\(\frac{20x20x20x20}{25x25x25x25x25}\)x1024=625x\(\frac{4x5x4x5x4x5x4x5}{5x5x5x5x5x5x5x5x5x5}\)x1024=625x\(\frac{256}{15625}\)x1024=10485,76
d)(-10/3)5.(-6/5)4=\(\frac{-100000}{243}\)x\(\frac{-1296}{625}\)=\(\frac{2560}{3}\)
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