Exact Solutions to the Sharma-Tasso-Olver Equation by Using Improved<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:msup><mml:mi>G</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mo>/</mml:mo><mml:mi>G</mml:mi></mml:math>-Expansion Method
Journal of applied mathematics