Example

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

Question

$$\frac{15}{16}+[(\frac{3}{2}-\frac{1}{4})^{2}:\frac{5}{4}-(\frac{1}{2}+\frac{1}{4})^{2}]$$

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