Making Calculator

[nereden23]

Hi guys!
What I'm trying to do is making a scientific calc. which is basicly consist of 12 functions like square, average, log etc. I have done majority of them but couldn't managed to do some of them as you see in the file.I'm confused and stucked. We are going to have an exam next week so i'm trying to learn these stuff.. Waiting your helps to complete this. Thank you.

[mrice]

Maybe you could use this approach

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[nereden23]

wow appreciate this, thank you!!

[nereden23]

How can i make matrix operations with this??

[nereden23]

Or how can i define the dot "." ??(i did this one right now )