Simplify -5f-7g+f-5g-4+f

$- 5 f - 7 g + f - 5 g - 4 + f$

Add $- 5 f$ and $f$ .

$- 4 f - 7 g - 5 g - 4 + f$

Add $- 4 f$ and $f$ .

$- 3 f - 7 g - 5 g - 4$

Subtract $5 g$ from $- 7 g$ .

$- 3 f - 12 g - 4$

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