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Function Operations
Given the function `f(x)=4 x - 5` and the function `g(x) = 3x^2+8x + 18` determine each of the following.

Give your answer as a whole number or a simplified fraction.
Evaluate `f(5) + g(9)`      `f(5) + g(9) = `
 
Evaluate `g(4) - f(7)`      `g(4) - f(7) = `
 
Evaluate `f(11) * g(6)`  `f(11) * g(6) = `
 
Evaluate `g(2)/f(7)``g(2) / f(7) = `
 

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