What is the process for executing a mathematical expression using a string that the script obtains from the command line?

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Here is the general process for executing a mathematical expression using a string that the script obtains from the command line:

1. Accept the mathematical expression as a string input from the command line.
2. Parse the string to ensure it is a valid mathematical expression and contains only numbers, operators, and parentheses.
3. Convert the string expression into a data format that can be evaluated by the programming language (e.g., postfix notation, binary tree).
4. Evaluate the expression based on the order of operations (parentheses, exponentiation, multiplication and division, addition and subtraction) using a stack, queue, or recursive function.
5. Return the result of the mathematical expression.

For example, if the command line input is "2+34", the script would parse the string to ensure it is valid, convert it into postfix notation (2 3 4 * +), evaluate it using a stack (push 2, push 3, push 4, pop 4 and 3, evaluate 34, push 12, pop 12 and 2, evaluate 2+12), and return the result of 14.