Instructions: enter a valid RPN expression. The following operators are supported:

• Arithmetic operators: + * - /
• Trigonometric operators: SIN, COS, TAN, COT
• SQRT (square root) and SQR (square)
• ^ is the power operator
• MAX (max. of all elements)
• MAX2 (max. of last 2 elements)
• Read more about Reverse Polish Notation

Examples:

• -3 2 + returns the sum of -3 and 2 : -1
• 9 SQRT returns the square root of 9: 3
• 3 5 8 * 7 + * returns 41
• 5 3 4 2 9 1 MAX returns max value of the list: 9
• 2 3 ^ returns 2 to the power of 2: 8
• 90 SIN returns the sinus of 90