have you ever tried to put the following code in google? 
sqrt(cos(x))*cos(200 x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01, sqrt(9-x^2), -sqrt(9-x^2) from -4.5 to 4.5
or
graph 0.75x^(2/3)+(1-x^2)^(1/2),0.75x^(2/3)-(1- x^2)^(1/2)
have you ever tried to put the following code in google?
sqrt(cos(x))*cos(200 x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01, sqrt(9-x^2), -sqrt(9-x^2) from -4.5 to 4.5
or
graph 0.75x^(2/3)+(1-x^2)^(1/2),0.75x^(2/3)-(1- x^2)^(1/2)
