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diff --git a/node_modules/core-js/modules/es7.math.imulh.js b/node_modules/core-js/modules/es7.math.imulh.js
new file mode 100644
index 000000000..a25da686a
--- /dev/null
+++ b/node_modules/core-js/modules/es7.math.imulh.js
@@ -0,0 +1,16 @@
+// https://gist.github.com/BrendanEich/4294d5c212a6d2254703
+var $export = require('./_export');
+
+$export($export.S, 'Math', {
+  imulh: function imulh(u, v){
+    var UINT16 = 0xffff
+      , $u = +u
+      , $v = +v
+      , u0 = $u & UINT16
+      , v0 = $v & UINT16
+      , u1 = $u >> 16
+      , v1 = $v >> 16
+      , t  = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);
+    return u1 * v1 + (t >> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >> 16);
+  }
+});
\ No newline at end of file