var x,y1,y2,y3: real;
begin
write('Введите x: ');
readln(x);
y1:=4*x-23;
y2:=23*x*x+17*x-11;
y3:=21*x-(51*x-1)/(4*x*x+81);
writeln('Y1 = ',y1);
writeln('Y2 = ',y2);
writeln('Y3 = ',y3);
end.
var x,y1,y2,y3: real;
begin
write('Введите x: ');
readln(x);
y1:=4*x-23;
y2:=23*x*x+17*x-11;
y3:=21*x-(51*x-1)/(4*x*x+81);
writeln('Y1 = ',y1);
writeln('Y2 = ',y2);
writeln('Y3 = ',y3);
end.