\(=4\cdot\dfrac{1}{16}+25\cdot\left(\dfrac{3}{4}:\dfrac{5}{4}\right)^3:\left(\dfrac{3}{2}\right)^3\)
\(=\dfrac{1}{4}+25\cdot\left(\dfrac{3}{5}:\dfrac{3}{2}\right)^3\)
\(=\dfrac{1}{4}+25\cdot\left(\dfrac{2}{5}\right)^3=\dfrac{1}{4}+25\cdot\dfrac{8}{125}=\dfrac{1}{4}+\dfrac{8}{5}=\dfrac{37}{20}\)
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4 . (1/4)2 + 25 . (3/4)3 : (5/4)3 : (3/2)2
= 4 . 1/16 + 25 . (3/4 : 5/4)3 : (3/2)3
= 1/4 + 25 . (3/5 : 3/2)3
= 1/4 + 25 . (2/5)3
= 1/4 + 25 . 8/125
= 1/4 + 8/5
= 37/20
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