Calculate expressions in Python -- 2

I am a competitive programmer and I have written such several hundreds of codes before. I can give the code right away in few minutes.

Hello, I am a data science engineer, I am certified by the University of Michigan in applied data science with paython and deep learning. In addition I carried out several projects in different fields using python, machine learning and deep learning. I just checked your project carefully. so it is very motivated and interesting for me. It is an ideal match for my skill and experience. if you hire me,you would get perfect result and service asap I hope work hardest for your success let us discuss more details. Thanks.

Hello sir, I have gone through the requirements. Hire based on discussion. don't pay if result not as per requirements. Let's discuss. You could go through my profile for info. Thanks.

I can make your project very easily and fast. I'm computer engineer and writing this program is my job

I am good at data structure, it implement and also good data structures. This makes me perfect for this project. It can be easily implemented using single stack. Expression evaluation is all about precedence and associativity of operators which can be easily handled using stack.

hi , I'm a senior software developer with around 2.5 years of experience. I've worked on a lot similar projects . hoping to hear from you. Regards, Arnab