Squats are great for your legs and core. Stand with feet apart, bend knees and hips, then stand up again.
Lay on back, bend knees, lift hips up using butt muscles, hold, then lower down slowly. Helps sitting too long.
Side step ups strengthen your butt muscles and inner thighs. Stand beside a step, put one foot on it, push up, tap the other foot, then lower it down. Repeat on both sides.
Lie on your side, legs stacked. Lift top leg, keep behind to work glutes. Hold, then lower. Repeat on both sides. Add weight or band for more challenge.
Donkey kicks work your butt. Get on all fours, lift one leg back, hold for a sec, and repeat on the other side.
Most gyms have machines for inner and outer thighs. Sit, adjust weight, squeeze legs in for inner thighs, push legs out for outer thighs.
Fire hydrants are like donkey kicks, but sideways. Lift your leg to the side while on hands and knees. It strengthens hips.