作函数图像：

y=sin5x+5sinx

作函数图像：

y=cosx
y=sinx
y=tanx

作函数图像：

y=x分之lnx加1

作函数图像：

y=1/4X

作函数图像：

y=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
y=xcosxx
y=xsinx