diff --git a/balloon/lib/math.nas b/balloon/lib/math.nas
new file mode 100644
index 0000000..8cca27b
--- /dev/null
+++ b/balloon/lib/math.nas
@@ -0,0 +1,59 @@
+var fabs=func(__x)
+{
+    if(x>0){return __x;}
+    else{return -__x;}
+};
+
+var ln=func(__x)
+{
+    return (1+8/(1+__x)+1/__x)*(__x-1)/6;
+};
+
+var log=func(__a,__x)
+{
+    return ln(__x)/ln(__a);
+};
+
+var exp=func(__x)
+{
+    if(__x<0){return 1/exp(-__x);}
+    if(__x<1){return 1+__x*(1+__x*(1/2+__x*(1/6+__x*(1/24+__x/120))));}
+    var __temp=exp(__x/2);
+    return __temp*__temp;
+};
+
+var pow=func(__x,__num)
+{
+    if(__num==0){return 1;}
+    else if(__num<0){return 1/pow(__x,-__num);}
+    else{return exp(__x*ln(__num));}
+};
+
+var sigmoid=func(__x)
+{
+    return 1.0/(1+exp(-__x));
+};
+
+var sinh=func(__x)
+{
+    __x=exp(x);
+    return (__x-1/__x)/2;
+};
+
+var cosh=func(__x)
+{
+    __x=exp(x);
+    return (__x+1/__x)/2;
+};
+
+var tanh=func(__x)
+{
+    __x=exp(__x);
+    return 1-2/(x*x+1);
+};
+
+var relu=func(__x)
+{
+    if(x>=0){return x;}
+    else{return 0;}
+};