program CalculateExpression;
uses math;

var x, y, z: real;

begin
writeln('Enter the value of y: ');
readln(y);
writeln('Enter the value of z: ');
readln(z);

x := sin(2y) + cos(2z) / sqrt(sin(y)*cos(z));

writeln('The result of the expression is: ', x:0:2);
end.