Set of rules:

1. You are not allowed to complex calculations in transcedental(log,sin,e^x...) functions for eg:(sin2+cos3) is not allowed however sin20,2^3, etc... is allowed.
2. While using the scientfic operator sine,cos,tan and log always remember the rule to write that is written below:
• Operator(num),for eg: sin20
3. For power function when you input the data and the power operator (^) ,on the screen aPowb will be displayed (where a and b are some numbers).