var x1,x2,x3,x4,i:integer;
function f(x1,x2,x3,x4:integer):real;
begin
f:=x1*sin(x2)+x3*sin(x4);
end;
Begin
for i := 1 to 10 do
readln(x1,x2,x3,x4);
writeln(" x1=",x1," x2=",x2," x3=",x3," x4=",x4," y=",f(x1,x2,x3,x4));
for j := 1 to n do
End.