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This calculator program supports a wide range of mathematical operations, including basic arithmetic, trigonometric functions, logarithmic functions, statistical calculations, and more. It also supports solving linear and quadratic equations, converting between degrees and radians, and matrix operations.

• Basic Arithmetic: Addition, subtraction, multiplication, division, and exponentiation.
• Square Root Calculation:sqrt for square root.
• Trigonometric Functions:sin,cos,tan,asin,acos,atan.
• Logarithmic Functions:log for natural logarithm,log10 for base-10 logarithm.
• Factorial Calculation:factorial for calculating the factorial of an integer.
• Modulo Operation:mod for modulo operation.
• Prime Check:prime for checking if a number is prime.
• Linear Equation Solving:eq for solving linear equations of the formax + b = 0.
• Quadratic Equation Solving:qeq for solving quadratic equations of the formax^2 + bx + c = 0.
• Degree-Radian Conversion:deg2rad andrad2deg.
• Statistical Calculations: Mean (mean), median (median), mode (mode), standard deviation (stddev).
• Matrix Operations:matrix (not implemented yet).
• Memory Operations:mem for saving and recalling values from memory.

• The program displays a menu with available operations.
• Enter the corresponding operation keyword or symbol to perform a specific operation.
• To exit the program, typeexit.

• Supports expressions involving addition (+), subtraction (-), multiplication (*), division (/), and exponentiation (^).
• Expressions can be entered directly and will be evaluated.

• Operation:sqrt
• Enter a number to calculate its square root.

• Operations:sin,cos,tan,asin,acos,atan
• Enter the angle in radians to calculate the corresponding trigonometric value.

• Operations:log (natural logarithm),log10 (base-10 logarithm)
• Enter a number to calculate its logarithm.

• Operation:factorial
• Enter an integer to calculate its factorial.

• Operation:mod
• Enter two integers to calculate the modulo (remainder) of their division.

• Operation:prime
• Enter an integer to check if it is a prime number.

• Operation:eq
• Enter the coefficientsa andb for the linear equationax + b = 0 to find the value ofx.

• Operation:qeq
• Enter the coefficientsa,b, andc for the quadratic equationax^2 + bx + c = 0 to find the roots.

• Operations:deg2rad,rad2deg
• Convert degrees to radians or radians to degrees by entering the value.

• Operations:mean,median,mode,stddev
• Enter the number of elements and their values to calculate the respective statistical measure.

• Operation:matrix
• Matrix operations are not yet implemented.

• Operation:mem
• Save a value to memory or recall a value from memory.

> 3 + 4 * 2 / (1 - 5) ^ 2Result: 3.50

> sinEnter the angle (in radians): 1.5708Result: 1.00

> logEnter a number: 2.7183Result: 1.00

> factorialEnter an integer: 5Result: 120.00

> modEnter two integers: 10 3Result: 1.00

> primeEnter an integer: 7Result: 7 is a prime number.

> eqEnter coefficients a and b for ax + b = 0: 2 -4Result: 2.00

> qeqEnter coefficients a, b, and c for ax^2 + bx + c = 0: 1 -3 2Roots: 2.00 and 1.00

> deg2radEnter degrees: 180Radians: 3.14

• The program handles both floating-point and integer inputs.
• Error messages are displayed for invalid operations or inputs, such as division by zero or invalid function names.
• Memory operations allow for saving and recalling values for later use.

This documentation covers all features and usage scenarios for the enhanced calculator program. Feel free to modify and expand it as needed!