Resolver - 4 + [- (- 4 + 9) + (- 4 - 2)] | 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

$$-4+[-(-4+9)+(-4-2)]$$