H&M Straight Leg White Stretch Pant

Mark on inside of pant near the care tag - see last pic. Not sure if this is a stain or can be washed out. Can't be seen on the outside of pant Stretch fabric Elastic Waist Seam going down the middle of the leg gives this a unique design 13." Waist (Measured side to side) 26" Inseam (Measured from crotch to bottom of pant)