T=d ld mf
V=x,y
R=-2,2,.1

# float accuracy just fails here.

F=sin(sqrt(10-x*x+y*y))+cos(sqrt(15-x*x-y*y))+sin(x*x+y*y)
C=fp_sin(fp_sqrt(10-x*x+y*y))+fp_cos(fp_sqrt(15-x*x-y*y))+fp_sin(x*x+y*y)
