diff --git a/zapiski/3_g1smo.scm b/zapiski/3_g1smo.scm
new file mode 100644
index 0000000..0296b60
--- /dev/null
+++ b/zapiski/3_g1smo.scm
@@ -0,0 +1,40 @@
+;; 1.29
+(define(cube x)
+  (* x x x))
+
+(define(sum-integers a b)
+  (if ( > a b)
+      0
+      (+ a (sum-integers (+ a 1) b))))
+
+(define(sum-cubes a b)
+  (if (> a b)
+      0
+      (+ (cube a) (sum-cubes(+ a 1) b))))
+
+
+(define (sum term a next b)
+  (if (> a b)
+      0
+      (+ (term a)
+         (sum term (next a) next b))))
+
+(define (integral f a b dx)
+  (define (add-dx x) (+ x dx))
+  (* (sum f (+ a (/ dx 2.0)) add-dx b)
+     dx))
+
+(define (simpson f a b n)
+  (define h (/ (- b a) n))
+  (define (add-hh a) (+ a h h))
+  (* (+ (- (f a))
+        (* 2 (sum f a add-hh b))
+        (* 4 (sum f (+ a h) add-hh b))
+        (- (f b)))
+     (/ h 3.0)))
+
+
+(display (simpson cube 1 2 100))
+(display "\n")
+(display (simpson cube 1 2 1000))
+(display "\n")