Example

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

Question

$$\frac { - 3 } { x ^ { 2 } + 2 x - 8 } + \frac { 2 } { x ^ { 2 } + 5 x + 4 } - \frac { 1 } { x }$$

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