Please help i am really struggling . i really dont get it thanks :)

Which expression is equivalent to 5r6141 2r+st6

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"