refactored examples and readme

Author: vivekmaurya001

lib/node_modules/@stdlib/math/base/special/expf/README.md

@@ -83,7 +83,7 @@ v = expf( NaN );
 
 ```javascript
 var uniform = require( '@stdlib/random/array/uniform' );
-var expf = require( './../lib' );
+var expf = require( '@stdlib/math/base/special/expf' );
 
 var opts = {
     'dtype': 'float32'
@@ -93,7 +93,7 @@ var x = uniform( 100, -50.0, 50.0, opts );
 var i;
 
 for ( i = 0; i < 100; i++ ) {
-	console.log( 'e^%f = %f', x, expf( x[ i ] ) );
+	console.log( 'e^%f = %f', x[ i ], expf( x[ i ] ) );
 }
 ```