5x+3

5x + 3 is a linear polynomial in x.

Common things you might want to do:

• Solve for x when set to zero: 5x + 3 = 0 -> x = -3/5
• Differentiate with respect to x: d/dx(5x + 3) = 5
• Integrate with respect to x: ∫(5x + 3) dx = (5/2)x^2 + 3x + C
• If representing a line y = 5x + 3, slope = 5, y-intercept = 3

If you have a specific operation or equation, tell me and I’ll solve it.