please provide MATLAB code

also, for problem #$2,$ here is the functions:

$-(18*(1-3*$x$)).*$exp$(-$x$.^2-(3*$y$+1).^2)...$

$-6*(1-3*$x$).^2.*$x$.*$exp$(-$x$.^2-(3*$y$+1).^2)...$

$-(10*(3/5-81*$x$.^2)).*$exp$(-5*$x$.^2-6*$y$.^2)...$

$+(20*((3/5)*$x$-27*$x$.^3-243*$y$.^5)).*5.*$x$.*$exp$(-5*$x$.^2-6*$y$.^2)...$

$-(1/3*(-18*$x$-6)).*$exp$(-(3*$x$+1).^2-9*$y$.^2)+2*$x;

and:

$3*(1-3*$x$).^2.*(-18*$y$-6).*$exp$(-$x$.^2-(3*$y$+1).^2)...$

$+12150*$y$.^4.*$exp$(-5*$x$.^2-6*$y$.^2)...$

$+(20*((3/5)*$x$-27*$x$.^3-243*$y$.^5)).*6.*$y$.*$exp$(-5*$x$.^2-6*$y$.^2)...$

$+6*$y$.*$exp$(-(3*$x$+1).^2-9*$y$.^2)+2*$y;