Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$(\frac{7}{2})^{2}-(-\frac{5}{4})^{0}+(\frac{7}{3})^{2}:3$$

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