関連ワード:  what are the basic formulas in maths    what are the important formulas in maths    what are the basic formulas of maths in a pdf    what are the important formulas of maths for class 10    what are the formulas in maths    what are the formulas in maths class 8    what are the most important formulas in math    what are the 20 formulas in maths    what are the 50 formulas in maths    what are the mensuration formulas in maths