y=function('y')(x)
temp =diff(x*y^2+cos(x)-ln(x))
ans =solve(temp,diff(y)) ;ans

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-3-a3ea5b49125c> in <module>()
----> 1 y=function('y')(x)
      2 temp =diff(x*y^2+cos(x)-ln(x))
      3 ans =solve(temp,diff(y)) ;ans

NameError: name 'function' is not defined