Example

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

Question

$$\frac { 12 \cdot 15 ^ { 3 } \times \sqrt { 0.3413 } } { 161 + 5 }$$

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