cengage maths
algebra
http://shrinkybee.com/jGyI4I1
calculus
http://shrinkybee.com/OHoi8J5l
trignometry
http://shrinkybee.com/B1Ya
vector & 3-D
http://shrinkybee.com/UO4srNx
coordinate geometry
http://shrinkybee.com/oHge2W