No!
Brackets are useful to avoid ambiguity when writing mathematics in text-based systems. They are also essential when you want, say, an addition to be done before a multiplication.
Have a look at: https://www.mathsisfun.com/binary-number-system.html
.
0/0 is indeterminate.
If you have side lengths a, b and c, where side a is opposite angle A then the cosine rule is:
cos(A) = (b^2 + c^2 - a^2)/(2*b*c)
It doesn't have a linear regression facility unfortunately.
As follows?
The graph below might help:
The Riemann zeta function has an infinite number of (trivial) zeros (at negative even integers)!
See http://mathworld.wolfram.com/RiemannZetaFunctionZeros.html for more.
If x = 0 then 12 cos(5t) + 4sin(5t) = 0
Rewrite as 4sin(5t) = -12cos(5t)
Divide both sides by 4cos(5t) to get: tan(5t) = -3
This gives 5t = tan-1(-3) so 5t = 1.893 radians (tan is negative in the 2nd quadrant)
t = 1.893/5 = 0.379
+33667 
