2*sqrt(-abs(abs(x)-1)* abs(3-abs (x))/ ((abs(x)-1)*(3-abs(x))))* (1+abs( abs(x)-3)/ (abs(x)-3))*sqrt(1-(x/ 7)^2) +(5+0.97(abs(x-.5)+abs(x+.5))- 3*(abs(x-.75)+abs(x+.75))) (1+abs(1-abs(x))/(1-abs(x))), -3*sqrt(1-(x/7)^2)*sqrt(abs(abs(x)-4) /(abs(x)-4)), abs(x/2)-0.0913722(x^2)-3+ sqrt(1-(abs(abs(x)-2)-1)^2), (2.71052+(1.5-.5*abs(x))-1.35526*sqrt(4- (abs(x)-1)^2))*sqrt(abs(abs(x)-1)/(abs(x) -1))+0.9