Coding and Decoding Questions

In a certain code language, "SINGING" is written as "TJOHJOH". How is "DANCING" written in that code language?

If 92 A 42 B 32 = 56 and 72 A 22 B 12 = 44, then 112 A 52 B 72 = ?

In a certain code language, "COPIOUS" is written as "2345389" and "GENEROUS" is written as "16760389". How is "PIGEON" written in that code language?

If "-" means "plus", "x" means "divide", "÷" means "multiply" and "+" means "minus", then 26 + 400 x 20 – 21 ÷ 12 = ?

In a certain code language, "OCEAN" is written as "PEHES". How is "RIVER" written in that code language?

The following equation is incorrect. Which two signs should be interchanged to correct the equation? 12 - 6 x 5 + 20 ÷ 4 = 31

If RESEARCH is $#!#%$&@ then SCARE is

If ETHANOL is coded as HWKDQRO, then how will MIX be coded as?