u := (x+y+z)ˆ2; df(ws,x); int(ws,y); matrix m(2,2); m := mat*1; ( x + y ) ^ 2; latex:\black$\displaystyle x^2+2\*x\*y+y^2$ ( x + y + z ) ^ 2; latex:\black$\displaystyle x^2+2\*x\*y+2\*x\*z+y^2+2\*y\*z+z^2$ df(ws, x); latex:\black$\displays…