\(7.2^3-5\left[10,51+4.\left(\dfrac{3}{4}-\dfrac{2}{3}\right)^2\right]-2021^0\)
\(7.2^3-5\left(10,51+4.\dfrac{1^2}{12^2}\right)-2021^0\)
\(7.8-5\left(10,51+4.\dfrac{1}{144}\right)-1\)
\(56-5\left(10,51+\dfrac{1}{36}\right)-1\)
\(56-5\left(\dfrac{1051}{100}+\dfrac{1}{36}\right)-1\)
\(56-5\left(\dfrac{37826}{3600}+\dfrac{100}{3600}\right)-1\)
\(56-5.\dfrac{2107}{200}-1\)
\(56-\dfrac{2107}{40}-1\)
\(\dfrac{2240}{40}-\dfrac{2107}{40}-\dfrac{40}{40}\)
\(\dfrac{93}{40}\)
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