Creating A Better Calculator (python)

To calculate f(x), your program should do the following: Prompt for f(x), i.e., an arithmetic expression that uses the variable x. Store this expression as a string variable. Prompt for the value of x. Evaluate f(x) for the given x. Print the result as shown below.

Enter f(x): (x + 27) / x ** 2

Enter the value of x: -9.234

f(x) = (x + 27) / x ** 2

f(-9.234) = 0.208357873964

The last two lines of output must be consistent with these examples, i.e., the next to the last line must be f(x) = followed by the expression the user entered. The last line must show the function with the value of x as its argument and the actual result of the function for this value. To generate the last line of output, use the sep optional parameter in the print() statement to eliminate spaces between the output values.

This program may define a single function: main(), but may use more functions if you would like to do so. The last statement of your program should be a call to main(). Import the math module so that you can calculate complex expressions such as the following:

Enter f(x): cos(pi * x / 2) + sin(x) - exp(-x)

Enter the value of x: 0.5

f(x) = cos(pi * x / 2) + sin(x) - exp(-x)

f(0.5) = 0.580001660078117