Can't parse condition after the comma

No equation to graph. Try 'y = x'

A condition after the comma is not appropriate here

Can't graph 2D vector plots in 3D

Can't graph 2D inequalities in 3D

Can't graph equations using multiple coordinate systems

Parameters 'u' and 'v' can only be used in parametric surfaces

Parameter 't' can only be used in parametric curves

Can't graph equations with question marks

Can't graph equations of this form