diff --git a/chen.java b/chen.java
new file mode 100644
index 0000000..c34a6a1
--- /dev/null
+++ b/chen.java
@@ -0,0 +1,11 @@
+package sxv;
+
+public class chen {
+	double che(double w,double e)
+	{
+		double y;
+		y=w*e;
+		return y;	
+}
+}
+
diff --git a/chu.java b/chu.java
new file mode 100644
index 0000000..2dd3619
--- /dev/null
+++ b/chu.java
@@ -0,0 +1,10 @@
+package sxv;
+
+public class chu {
+	double ch(double w,double e)
+	{
+		double y;
+		y=w/e;
+		return y;	
+}
+}
\ No newline at end of file
diff --git a/ds.java b/ds.java
new file mode 100644
index 0000000..c62e43e
--- /dev/null
+++ b/ds.java
@@ -0,0 +1,11 @@
+package sxv;
+
+public class ds {
+	double d(double w,double e)
+	{
+		double y;
+		y=Math.sqrt(w);
+		return y;	
+}
+}
+
diff --git a/mo.java b/mo.java
new file mode 100644
index 0000000..f0983bd
--- /dev/null
+++ b/mo.java
@@ -0,0 +1,10 @@
+package sxv;
+
+public class mi {
+double m(double w,double e)
+{
+	double y;
+	y=Math.pow(w, e);
+	return y;	
+}
+}