Resolver [-6+(4+2)-(-9)]-(-4)-(+7-5)+(-12)]+7-15 | 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

$$[-6+(4+2)-(-9)]-(-4)-(+7-5)+(-12)]+7-15$$