3) The number of positive intergers x with x < (or equal than, don't know how to do the line under it) such that each of the rational expressions

7x+1/2 , 7x+2/3 , 7x+3/4.......7x+300/301

^ The whole thing is over 2,3,4...301.. no just the closest number btw

is in lowest terms (i.e. in each expression, the numerator and demoninator have no common factors) is..?