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]
[]
]]
)