TI-Basic Developer

I have developed this code on my ti-nspire software. I ported it to Matlab, and it works I'm assuming that there is some simple order of operation errors. Please look it over and see where its wrong desireded function is x^2.10-2sin(x), 0,4,30 the results should be ea=0.000093 xopt=1.427552 As stated this identical code works in mat lab as a function when reformated ideally, I would be able to set the conditions to the while loop as ea>es and have it calculate as many iterations as necessary to get to a reasonable error percentage.

question about programs availible

I'm looking for something like ClrList of the ti-89 for the nspire

im thinking about buying this calculator, is it good for programming?

Arguments not passing their given value to interior integral function.

Is it doable?

Finding the largest prime twins under a given number

Finite element method on Ti Inspire