Simplify f+f+f+f+ff + f + f + f + ff+f+f+f+f and 5a+3b+2a+2b5a + 3b + 2a + 2b5a+3b+2a+2b
260 exam-style questions on OCR GCSE Maths Simplifying Algebra. Each one has a worked solution and a mark scheme showing where the marks go.