Question: what is the instruction

whenever i use maplesoft, i`m wondering about the instruction which is to show me the explanation about answers.

Maplesofte must be worked by some principles , therefore it can show the explanation of any answers to users

please let me know what is the instruction that i can watch explanations.

 

for example /

> int(f(x)*g(x),x);

sin(x) - x cos(x) - 1/2 cos(x) sin(x) + 1/2 x

 how can it get an answer, i wanna see that

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