Draw a function image：

y=x-4tanx/4

Draw a function image：

y=40.31+73.37sinx+12.63cosx+58sin2x+174cos2x+176sin3x+39.407cos3x
y=38.19+79.38sinx+11.17cosx+62sin2x+156cos2x+165sin3x+46.08cos3x
y=34.65+73.37sinx+10.08cosx+76sin2x+168cos2x+168sin3x+50.388cos3x
y=31.12+89.47sinx+11.37cosx+62sin2x+178cos2x+182sin3x+44.609cos3x

Draw a function image：

y=1+36x/（x+3）²

Draw a function image：

y=x^2/3+0.9*（10000000000000-x^2）^1/2*sin（3.14x）;

Draw a function image：

y=sinx*x+x^5