MATLAB - Are two sym Expressions Equal

Original Source

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~Example:

eq1 = x(t) == -4*t
eq2 = y(t) == -4*t
isequal(rhs(eq1), rhs(eq2))
>> ans = 
	logical
	1
 
 
x = sin(a + b);
y = sin(a)*cos(b) + sin(b)*cos(a);
 
isequal(x, y)
>> ans = 
	logical
	0
	
isAlways(x==y)
>> ans =
	logical
	1