description:h=minus(f, g) is called for the syntax 'f - g' and means symbolic subtraction. arguments:f and g are NCpolys representing polynomials or matrix of NCpolys with matching dimensions output:NCpoly representing the polynomial f - g possible usage:f - g, minus(f, g) example: >> f=[x^2-2*x*y,(x+y)^2];g=[x*y+x*x,x^2+y^2]; >> f-g ans = -3*x*y x*y+y*x |