Plot[(x-1)(((x-2))^2),{x,-70,70},AxesLabel->{"x","y=(x-1)(x-2)^2"},PlotPoints->100]
Plot[x+Sin[x],{x,-10,10},AxesLabel->{"x","y=x+Sin[x]"},ColorFunction->"Rainbow"]

y[x_]:=((Sin[x])/(1+(x^2)))
Plot[{y[x],y'[x]},{x,-90,90},PlotLegends->"Expressions"]

a=1;
ParametricPlot[{a Cos[2t],a Cos[3t]},{t,-π,π}]
ParametricPlot[{t Log[t],Log[t]/t},{t,0,6π},AspectRatio->1/3]

Plot3D[Exp[-(x^2)-(y^2)],{x,-3,3},{y,-3,3}]
Plot3D[Sin[x+Cos[y]],{x,-6,6},{y,-6,6}]
Plot3D[(((x^2)-(y^2))/((x^3)+(y^3))),{x,-10,10},{y,-10,10}]

Plot3D[(x/(Exp[(x^2)+(y^2)])),{x,-2,2},{y,-2,2},RegionFunction->Function[{x,y},2<(x^2)+(y^2)<3]]
Plot3D[(1/((y^2)-(x^3)+3x-3)),{x,-3,3},{y,-3,3},RegionFunction->Function[{x,y},0<Mod[(x^2)+(y^2),2]<1],PlotPoints->100]