Programming symbolically

To community

I am working with Mathcad Prime 2.0 and I need the operator of partial derivative ∂/∂x and a short form x( point on top)=d/dt.

The expression I am working with is so big that I like to have it in a very compact form. Is it possible to do it with Mathcad Prime 2.0 ?

I neither found ∂/∂x nor x( point on top) = d/dt.

differentiability of u=f(x1,x2,..........xn) x1(t), x2(t), ,xn(t) is necessary then

total total derivative du/dt = ∂u/∂x1 * dx1/dt + ∂u/∂x2 *dx2/dt+ ..................∂u/∂xn *dxn/dt.

I can do everything with d/dx but it does not look nice, furthermore it is mathematically in a strong sense wrong.

Perhaps someone of the community has a good idea and let me participate.

Thanks in advance

Vibron