Bài làm
\(7+\left(\frac{7}{12}-\frac{1}{2}+3\right)-\left(\frac{1}{12}+5\right)\)
\(=\frac{84}{12}+\left(\frac{7}{12}-\frac{6}{12}+\frac{36}{12}\right)-\left(\frac{1}{12}+\frac{60}{12}\right)\)
\(=\frac{84}{12}+\frac{37}{12}-\frac{61}{12}\)
\(=\frac{60}{12}\)
\(=5\)
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