math pars

#parsing math

input = gets.chop
operators=["+","-","*","/"]
brackets_count = input.count '('
if brackets_count > 0
end

numbers=['']
buffer=[]
available=0
ncount=0
operators_in=[]
@out=[]

for i in 0...input.size
    unless ('0'..'9')===input[i] or input[i]=='.'
        numbers << ''
        @out[ncount]=[] unless @out[ncount]
        @out[ncount]<<input[i]
        ncount+=1
    else
        numbers[ncount]<<input[i]
        @out[ncount]=[] unless @out[ncount]
        @out[ncount][1]=''unless @out[ncount][1]
        @out[ncount][1]<<input[i]
    end
end
numbers.size.times do |i|
    numbers[i]=numbers[i].to_i
end

@out = @out.inject:+
for i in 0...@out.size
    if @out[i]==nil
        @out.delete_at i
    end
end
@out = @out.map do |str|
    if ('0'...'9')===str[0] then
        str=str.to_f
    elsif not operators.index(str)
        str=nil
    end
    str
 end
@out.delete nil
p @out

###part 2

if operators.index(@out[0])
    x=@out[1].to_s
    x.insert(0,@out[0])
    x=x.to_f
end
while @out[2].class==Float
    x=@out[0].method(@out[1]).call(@out[2])
    @out[0]=x
    @out.slice! 1..2
end
p @out