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A function f:[-7, 6) to R is defined as ...

A function `f:[-7, 6) to R` is defined as follows.
`f(x)={(x^(2)+2x+1, -7lexlt-5), (x+5, -5lexle2), (x-1, 2ltxlt6):}`
Find `2f(-4)+3f(2)`

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