Here's some more examples: cos((x - t)) + cos(0.5877852522924731*y + 0.8090169943749475*(x - t)) + cos(0.9510565162951535*y + 0.30901699437494745*(x - t))

Here's some more examples: cos((x - t)) + cos(0.5877852522924731*y + 0.8090169943749475*(x - t)) + cos(0.9510565162951535*y + 0.30901699437494745*(x - t)) + cos(0.9510565162951536*y - 0.30901699437494734*(x - t)) + cos(0.5877852522924732*y - 0.8090169943749473*(x - t)) = z 10.0*(pow(sin(0.1*(x*x-y*y)), 2.0) + pow(sin(0.2*x*y), 2.0))/sqrt(x*x + y*y) = z x*x+y*y+z*z=2.0+cos(t+10.0*x+24.0*y)+cos(t - 10.0*x+24.0*y+16.0*z)+sin(t+x+y+2.0*z)+cos(3.0*t+y-z)+sin(2.0*t+x*y)+cos(t+3.0*x*y)+sin(0.1*t+y*z + 7.0*x*y)+cos(0.5*t+x*y*z)+cos(5.0*z)+cos(1.618*t+7.0*z)+cos((x+2.0*y)*(2.0\*z-y))