1. https://www.google.com.vn/search?q=%28sqrt%28cos%28x%29%29*cos%28200+x%29%2Bsqrt%28abs%28x%29%29-0.7%29*%284-x*x%29^0.01%2C+sqrt%289-x^2%29%2C+-sqrt%289-x^2%29+from+-4.5+to+4.5&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:vi:official&client=firefox-a&channel=rcs