i have to proof theorom using Lean rul
have a look at the following link for an example, if you think you can do help me with this type of example let me know.
https://leanprover-community.github.io/lean-web-editor/#code=namespace%20Ques_09%0A%0Avariables%20D%20E%20%3A%20Prop%0A%0Atheorem%20Ques_9%20%28h%20%3A%20D%20%E2%88%A8%20E%29%20%28h2%20%3A%20%C2%AC%20D%29%20%3A%20E%20%3A%3D%0A%0A%0A--%20end%20namespace%0Aend%20Ques_09
MASTERS IN COMPUTER SCIENCE
HELLO DEAR CLIENT
I have gone through your project details and the work is DOABLE since its within my area of EXPERTISE.I will tackle are required guideline to deliver desired goal Please consider my bid. THANKS