What appears hard in one approach may appear easier in another. G Calculators and Computers Calculators lessen the need for us to do arithmetic but, in using them, mistakes can be made. Here you need to know in advance what kind of answer a computation will yield. If you think you have made a mistake in entering numbers or instructions, you need to reenter them again. If a different result appears from before, at least one of your efforts, the original or the check, will be in error.
Computer programs can perform arithmetic and algebraic or symbolic operations.
They can also draw graphs and solve some equations rapidly. These programs do not provide solutions to all possible problems. For the solutions they can provide, you have to understand the statement of the initial problem. Understanding is an personal affair. No computer and no other person can do this for you.