y= x+1/(2*x)

y=x

y=(x-1)*(x+1)*(x-2)

y=x^3-4*x-5

y=-4*x+4

y=3/x^(5/3)

y=2.5/x

y=15/[(4+(1.5*x-12/x)^2)^0.5]

y=15/[(18+(1.5*x-12/x)^2)^0.5]

y=3*x^4-4*x^2

y=sin( cos(x) )*x

y=1/x

y=cos(x^3)

y=sin(x)

y=cos(x)

y=sin(1/x)

y=(2*x^2+4*x-16)/(x^2+2*x-3)

  0<a<2*pi  ,  a(step)=0.1

Fx(a)=R*cos(a)

Fy(a)=R*sin(a)

Fz(a)=0

      R=3-6*sin(a)

y=5*[sin(0.2*x)+cos(0.7*x)]