Example

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

Question

$$[4\cdot25+2\cdot25+15\cdot[2\cdot25-5\cdot(36:6-2\cdot2)]-24\cdot25\}:(27:3+1)$$

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