Resolver ( ii) (13 + 7)(9 - 4) - 18 ^ 21 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$( 13 + 7 ) \times ( 9 - 4 ) - 18 ^ { 2 }$$