Let $f(x)=-5 x+2$ Find the indicated expression. \[ f(-x) \]

Step 1 ：Let the function be \(f(x)=-5x+2\).

Step 2 ：To find \(f(-x)\), we substitute \(-x\) in place of \(x\) in the function.

Step 3 ：So, \(f(-x) = -5(-x) + 2 = 5x + 2\).

Step 4 ：Final Answer: The expression \(f(-x)\) for the function \(f(x)=-5x+2\) is \(\boxed{5x+2}\).