(1) Sqr(x*x+y*y)
(2) Cos(30*3.1415926/180)^2 - Sin(30*3.1415926/180)^2
(3) 1+(x /(1+(x /(1+x))))
(4) Log(x)/ Log(10)+ Exp(3)/ x ^(2/3)
(5) Sqr(Abs(2*x1 + 3*x2*x3))
(6) Log((Exp(x*y)+Abs(Atn(Z)+Sin(x)^3))/(x + y +z))