I am trying to solve laplaces eqn in maple, and i cannot see an error in my code, however when i run it it returns me nothing. No error, not solution. just nothing.

pde := (diff(u(x, y), x, x))+diff(u(x, y), y, y) = 0;

bc[1]:= D[2](u)(x,0) = 0;
bc[2]:= (u)(x,1) = x^2-x;
bc[3]:= (u)(0,y)=0;
bc[4]:= (u)(1,y)=0;

pdsolve({pde, bc[1], bc[2],bc[3],bc[4]}, HINT= X(x)*Y(y));

what is going wrong?

I have written the following code; 

Do := proc( F::algebraic , Q::list)
local n:=nops(F), m:=nops(Q);
seq(F[i]~(Q[i]), i=1..n);
end proc:

which does not work

I know there is a really simple mistake but i just cannot see it.

I am trying to plot matrix in maple, and from the help i believe i need to use matrix plot. 

I am trying to do something like; 

matrixplot(Matrix(2,2,{x^2,y^2,x*y,y},[x,y]);

for example. Is there a way to do this? Just like plotting a graph without specifying the range of x and y. 

thanks