Hello,

Instead of using |, separate your equations with and :

The problem is that they rather consider y as a variable than a function. This is partly why there is an error.Code:solve(d(x^2+3,x)=y and d(y,x)=-1,x)

There are huge problems in your syntax. For systems of equations, you must have : solve(...=!!! and :::=^^^,{variable1,variable2})

After thinking about it, I don't really know...