dear friends, I want to solve this integration with numeric methods. when i type it as nested integrals i reach the first answer, but when i want to use int(int), maple doesn't solve it(second answer). what's wrong with the input?

If we use numerical approximation to my integral(methods available in Student[NumericalAnalysis] package) the answer will be better or worse? I used simpson method for the my integral and i want you to compare this answer with the direct answer that we reached in the last comment..thank u so much

the first answer is the direct answer, and second & third answer is the use of simpson rule withh the numerical methods.which answer is better?

hi dear friends

i want to solve this int with numeric methods such that doesn't contain erf function

thanks alot

(my function is e1, and I want to calculate the int of e1)