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 Apr 14 comment Find min-max for slope in linear fit all right thanks. I was looking if there were easy method. Apr 14 comment Find min-max for slope in linear fit thank you for answer. Could it be possible to add error values for $x$ values too? Mar 26 comment How to tell Mathematica that certain variables are real/imaginary, integer-valued, etc This doesn't work Refine[Im[E^(t + I Pi/4)], Element[t, Reals]] :( Feb 5 comment intermediate steps of simplification of algebraic expression without evaluation thanks, I'll wait for it. Please notify me if you do. Feb 5 comment intermediate steps of simplification of algebraic expression without evaluation works for me with little bit of tweaks!! Feb 5 comment intermediate steps of simplification of algebraic expression without evaluation @AlexeiBoulbitch that gives the final answer, I don't want the final answer. I want the intermediate step, collect the variables by factoring $c_1$ and $c_2$ so that I can copy steps from mathematica instead of writing the entire step. Feb 1 comment Interpolate the discrete list into continuous function just a small stupid question, what does symbol & mean at the end of Round[]? Feb 1 comment extract data from a graph image @Kuba thank you i'll check it out. Dec 7 comment converting miles into inches from wolframalpha @kguler any explanation for weird behaviour? Sep 20 comment step by step interactive indefinite integral @VahagnPoghosyan when i was in HS, if i couldn't solve an indefinite integral, i would check the answers on the last page of my textbook and differentiate and construct the answer. But I found it so different from the way it is generally solved, that I gave away that approach. LOL ... it's not nice. But I have to admit, it is equivalent solution. Sep 20 comment step by step interactive indefinite integral @VahagnPoghosyan yes i thought of that too ... but if I post that as solution, that will definitely get rejected. I mean I just want to know if it is possible or not. I don't know coding in Mathematica and although I have heard that Risch algorithm is used to find closed solution of Indefinite integrals, so far I haven't encountered myself. If it's not easily done then ... i should give up. Sep 20 comment step by step interactive indefinite integral @VahagnPoghosyan that's not what W|A gives ... does it? Dec 23 comment How to evaluate this indefinite integrate $\csc(4x)\sin(x)$ thanks for pointing out!! Dec 23 comment How to evaluate this indefinite integrate $\csc(4x)\sin(x)$ @rm-rf no this is not typo issue, I wanted to ask how would I get that value out of the complicated answer MMA gives me. Dec 23 comment How to evaluate this indefinite integrate $\csc(4x)\sin(x)$ I am extremely sorry for my mistake in Question. Dec 23 comment How to evaluate this indefinite integrate $\csc(4x)\sin(x)$ @belisarius sorry for that ... my mistake Dec 23 comment How to evaluate this indefinite integrate $\csc(4x)\sin(x)$ what does that mean?? Is my "correct answer" not correct? please check the link I added up. Jul 31 comment How to generate a recurrent sequence works ... and how do i evaluate it for x=1? Jun 19 comment how to plot $x=0$ and $y=0$ thank you ... i think i'll use this Jun 19 comment how to plot $x=0$ and $y=0$ thank very much you too ... and everyone