To find \((f-g+h)(x)\), we will first calculate \(f(x) - g(x) + h(x)\).
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Calculate \(f(x) - g(x)\): \[ f(x) = 5x + 7 \] \[ g(x) = 5x - 2 \] \[ f(x) - g(x) = (5x + 7) - (5x - 2) = 5x + 7 - 5x + 2 = 9 \]
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Now, add \(h(x)\): \[ h(x) = 5x + 3 \] \[ (f-g)(x) + h(x) = 9 + (5x + 3) = 9 + 5x + 3 = 5x + 12 \]
Putting it all together, we find: \[ (f - g + h)(x) = 5x + 12 \]
Thus, the final answer is: \[ \boxed{5x + 12} \]