This is a CAS engine (symbolic math) for the TI-84 Plus CE / TI-83 Premium CE calculators.

WARNING: if you own a 5.5+ version, you need to activate asm with arTIfice and asmhook in order to run the program.
arTIfice: https://tiplanet.org/forum/archives_voir.php?id=2641766
asmhook: https://tiplanet.org/forum/archives_voir.php?id=2643391

To use the program: enter the expression as a string
Example: "2X^2-6X+19X-8-14":prgmCASYMBA

Help is available from within the program.
To display help: "?":prgmCASYMBA


The program enables to perform the following operations:
		- simplification
		- derivative
		- nth derivative
		- partial derivative
		- primitive (incomplete)
		- tangent at a point
		- Taylor polynomial
		- ordinary differential equation (ODE) solving (order 1 and 2)
		- greatest common divisor of the 2 polynomials
		- quotient of the 2 polynomials
		- remainder of the 2 polynomials
		- simplification of division of 2 polynomials
		- expansion
		- prime factorization
		- polynomial factorization

Available functions:
	- to derivative: nDeriv(expression,var,var)
		- example "nDeriv(sin(X),X,X)":prgmCASYMBA

	- nth derivative: nDeriv(expression,var,n) n is a positif int
		- example "nDeriv(sin(X),X,2)":prgmCASYMBA

	- partial derivative: nDeriv(expression,var1,var2)
		- example "nDeriv(X+2Y,X,Y)":prgmCASYMBA

	- tangent at a point: Tangent(expression,var,point)
		- example "Tangent(e^(X),X,1)":prgmCASYMBA

	- primitive: fnInt(expression,var) (incomplete)
		- example "fnInt(sin(6X),X,X,X)":prgmCASYMBA

	- solving ODE: solve(equation,var,function)
		- example "solve(Y''-Y'-2Y=sin(2X),X,Y)":prgmCASYMBA
		- example "solve(Y'+2Y=­5*e^(­2X) and Y(0)=1,X,Y)":prgmCASYMBA
		- example "solve(Y''+2Y'+Y=2*e^(­X) and Y(0)=1 and Y'(0)=-1,X,Y)":prgmCASYMBA

	- Taylor polynomial: det(expression,var,ordre,point) (incomplete)
		- example "det(sin(X),X,3,0)":prgmCASYMBA

	- expand: stdDev(expression) 
		- example "stdDev((A+B)^2)":prgmCASYMBA

	- greatest common divisor of the 2 polynomials: gcd(poly1,poly2,var)
		- example "gcd(X^3-6X^2+11X-6,X^2-6X+8,X)":prgmCASYMBA

	- quotient of the 2 polynomials: int(poly1,poly2,var)
		- example "int(X^3-6X^2+11X-6,X^2-6X+8,X)":prgmCASYMBA

	- remainder of the 2 polynomials: remainder(poly1,poly2,var)
		- example "remainder(X^3-6X^2+11X-6,X^2-6X+8,X)":prgmCASYMBA

	- simplification of division of 2 polynomials: expr(poly1,poly2,var)
		- example "expr(X^3-6X^2+11X-6,X^2-6X+8,X)":prgmCASYMBA

	- prime factorization: identity(int) positive integer
		- example "identity(45)":prgmCASYMBA

	- polynomial factorization : identity(poly,var)
		- example identity(X^5+6X^4+10X^3-4X^2-24X-6,X)":prgmCASYMBA