mod1: 1+4%5
mod2: 1-5%4

arr1: []+[3 4]
arr2: arr1+[]
arr3: [3]+[4]
arr4: []+[]+[[]+[1]]

arr_complex: [[[1]+[]+[2]]]+[[[]+[3]]]+[]

str1: ""+'c'+"at"+""
str2: ""+"ca"+'t'+""
str3: ""+"c"+"a"+"t"+""
str4: 'c'+'a'+'t'

tup_complex: (
    [[]]+[[
        []
        [1 2 3]
        []
    ]]
)