F=(2y−cos(x))→i−z2e3x→j+(x2−7z)→k

It seems like you've posted a vector function but haven't asked a specific question about it. The function is:

F = (2y - cos(x))i - z^2 * e^(3x)j + (x^2 - 7z)k

This function is in three dimensions, represented by the i, j, and k unit vectors. The i component is a function of x and y, the j component is a function of x and z, and the k component is a function of x and z.

What would you like to know about this function?