To get lines and deep cuts like that comes with muscle maturity and years of strict routines..
So without knowing your age, and how long you've worked out, and what your body looks like in the present, and what your schedule is like, there really isn't a Majic formula..it all starts with diet, if definition is what your after you must remove a good part of fat from your diet..get yourself at least three solids a day that has a source of protein in each..try to space those three meals at least 4 hours in between..if your trying to cut weight, then that last meal is important to cut some of your complex carbs, protein and veges, salads at night (if your health permits) are an easy way to cut some weight, without knowing you I won't get into to many nutritional tips..except for those.
When it comes to training, maybe try to get into a morning cardio nightly weight training routine..if that's not reality for your lifestyle, then just get yourself in the proper mindset for your workout, and hit it hard, really concentrate on slowing your form, and using a full range of motion, really put your mind into the form your doing at that particular time, don't cheat for one inch, if the body part can't do the exercise properly in a full range of motion then drop the weight some so it can..once again without knowing your health history I won't get into to many details, just know that the lines, deep cuts, and definition your looking for comes from no secrets but excellent nutrition and consistent weight training.
All exercises done properly with proper focus on the body part can be beneficial to the body..so do them each the best you can.
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