getReadyInstruction wrong calculated value

[SamuelFarid]

While trying with line:
L = (1.2 + 3.4 - 5.6)/(2.13.2 + 4.6) - 12.13.1 + (1.2 + 5.2)^(4/(3.2+5.6))
it returns L = 2.236779
But the correct answer is L = -35.273