it can perform
- basic +, -, /, *
- logbase10
- logbaseE
- 10^x
- x^y
- factorial
- square root
- square
- reminder
- mod
- inverse
- floor
- ceil
- degree to radian and vice versa
- exponential to decimal and vice versa
- trigonometric function
- sin
- cos
- tan
- memory functions(memory start, m+, m-, memory clear, memory recall)