(((y>=0)-(y<0))*arcos(x/sqrt(x*x+y*y)))
sqrt(x*x+y*y)*cos(v*(((y>=0)-(y<0))*arcos(x/sqrt(x*x+y*y))))/(w*(x*x+y*y)+1)
sin(u*sqrt(x*x+y*y))*cos(v*(((y>=0)-(y<0))*arcos(x/sqrt(x*x+y*y))))/exp(w*(x*x+y*y)+1)