Решите ( желательно с разъяснениями как это все вы решили)​

Const nx=30;var i,j,p,n:integer;A:array[1..nx,1..nx] of integer;d,Sn,min:real;begin p:=1;write('Введите размер матрицы');Read(n);for i:=1 to n do beginfor j:=1 to n do beginA[i,j]:=random(3)-2;write(A[i,j]:4);end;writeln;end;writeln;writeln;for i:=1 to n do beginfor j:=1 to n do beginif i = j then begin if A[i,j]<> 0 then p:=p* A[i,j];write(A[i,j]:4);endelse write(' ':4);end;writeln;end;write('p =',p);writeln;writeln;for i:=1 to n do beginfor j:=1 to n do beginif (i= n -j +1) then begin if A[i,j]<> 0 then p:=p* A[i,j];write(A[i,j]:4);endelse write(' ':4);end;writeln;end;write('p =',p);end.

var k,n,i,s:integer;
begin
readln(k,n);
for i:=0 to n do  s:=s+k+i;
writeln(s)
end.

var k,n,i,s:integer;
begin
readln(k,n);
for i:=0 to n do  s:=s+k+i;
writeln(s/(n+1))
end.

var r,n,i,p:integer;
begin
readln(r,n);
p:=1;
for i:=0 to r do  p:=p*(n+i);
writeln(p)
end.

var r,i,p,x:integer;
begin
readln(r);
x:=1;
for i:=1 to r do
  begin
  x:=x*i;
  p:=p+x;
  end;
writeln(p)
end.

var r,i,p,x:integer;
begin
readln(r);
p:=1;
for i:=1 to r do
  begin
  x:=x+i;
  p:=p*x;
  end;
writeln(p)
end.

var m,n,t,i:integer;
begin
readln(t);
writeln('N':3,'M':5);
for i:=1 to (t div 2) do
  begin
  n:=i*2;
  m:=sqr(n)-n;
  writeln(n:3,m:5);
  end;
end.

var
  y,m,n,i:integer;
  x:real;
begin
readln(n,m);
writeln('Y':3,'X':10);
for i:=1 to m do
  begin
  y:=n*i;
  x:=sqr(y)*(sqr(y)-y)/y;
  writeln(y:3,x:10);
  end;
end.