If you don't understand the anti-derivative to start with sight, the substitution helps you to evaluate the integral with no excessive problem. There is apparently no way of simplifying or rearranging the integral. Integration by components only will work for getting the by-product from the exponential element, but that leaves https://gabletoppak.com/lakes-developed-under-smart-cities-initiative-in-coimbatore-turn-dumping-grounds-for-plastic-waste/