  The Comments are devoted to the paper 'Derivation of lump solutions to a
variety of Boussinesq equations with distinct dimensions' (Int J Numer Methods
Heat Fluid Flow. 2022;32:3072{3082), in which three new generalizations of the
classical Boussinesq equation are suggested that were further investigated in
several papers. Here it is shown that the equations derived in the above paper
are not presented in their canonical forms. It turns out that all three
equations can be essentially simplified by the standard technique widely used
for linear and quasi-linear PDEs. As a result, it is proved that the equations
suggested are not multidimensional generalizations of the Boussinesq equation.
