From 1c61e3e9c25bea99f132f1334bfce1b0ab0bb363 Mon Sep 17 00:00:00 2001
From: Grzegorz Adamski <grzada@st.amu.edu.pl>
Date: Thu, 11 Jan 2018 11:54:02 +0000
Subject: [PATCH] Dodaj '12/mathics.txt'

---
 12/mathics.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 12/mathics.txt

diff --git a/12/mathics.txt b/12/mathics.txt
new file mode 100644
index 0000000..9faaac2
--- /dev/null
+++ b/12/mathics.txt
@@ -0,0 +1,10 @@
+Solve [{2 x - 2 y +  z -  w == 7,
+      - x + 4 y - 5 z + 3 w == 1,
+        x +  y -  z +  w == 4,
+      -4 x + 2 y +  z - 2 w == 6}, {x, y, z, w}]
+Solve[x^3-21x+20==0,x]
+Plot[x^2-2x+3,{x,-2,2}]
+Plot[Cos[2x],{x,-2,2}]
+Plot[Sin [1/x],{x,-2,2},Axes->False]
+Plot3D[x^2 + y^2, {x, -2, 2}, {y, -2, 2},Axes->False]
+Plot3D[x^2 - y^2 + 2 x y ^2 + 1, {x, -2, 2}, {y, -2, 2}]
\ No newline at end of file