04-04-2020, 02:53 PM

The new version of CAS has improved many functions such as this function

Got
this is correct.

But there are errors in two functions。

Got

Got
Obviously, both are wrong

Code:

`(diff(∫(∫(f(sqrt(x^2+y^2)),x,-(sqrt(t^2-y^2)),sqrt(t^2-y^2)),y,-t,t),t,3)|(t>0))`

Code:

`2*π*t*diff(f(t),t,2)+4*π*diff(f(t),t)`

But there are errors in two functions。

Code:

`∂(∫((-(f(((a^2+a*x)/x)))+f(((a^2+x^4)/x^2)))/x,x,1,a),a)`

Code:

`(-(f(2*a))+f(a^2+1))/a`

Code:

`∂((f((a^2/x^2)+x^2)-(f((a^2/x)+x)))/x,x)`

Code:

`(f((a^2+x^2)/x)-(f((a^2+x^4)/x^2)))/x^2`