Stomach Issues

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Hi Fitness Pals. I have usually always maintained a weight somewhere around 148 but I stopped smoking about 6 months ago and now all of the fat has went straight to my belly and I have gained about 15 lbs. Now weighing 164, I have started dieting and exercise and I even joined Anytime Fitness. Can someone give m some tips on what exercises are best for the stomach area. I would like to really start toning more because the older I get the flabbier I get and that is sooooooooooo not attractive. Thanks