program d;
var a,s,h:real;
n,i: integer;
function f(x:real): real;
begin
f:=(sqr(x)+1)*sqr(cos(x))
end;
begin
writeln('Enter a, h, n:');
readln(a,h,n);
s:=0;
for i:=0 to n do s:=s+f(a+i*h);
writeln('S = ',s:2:2);
end.
program d;
var a,s,h:real;
n,i: integer;
function f(x:real): real;
begin
f:=(sqr(x)+1)*sqr(cos(x))
end;
begin
writeln('Enter a, h, n:');
readln(a,h,n);
s:=0;
for i:=0 to n do s:=s+f(a+i*h);
writeln('S = ',s:2:2);
end.