Coding and Decoding Questions

In a code language, if LUCK is written as L2U1C3K1, then what is the last digit for the code for XEROX in that same language?

If 3*1 = 20, 6*1 = 50 and 2*6 = -40, then find the value of 5*8 = ?

In a certain code language, "INSTANT" is written as "IOUWESZ". How is "FORGET" written in that code language?

In a certain code language, "READ" is written as "18514". How is "RATE" written in that code language?

In a certain code, "go home" is written as "ta na" and "nice little home" is written as "na ja pa". How is "go" written in that code?

In a certain code language, "REMOTE" is written as "KYSPGS" and "BRAND" is written as "IRDTC". How is "MOBILE" written in that code language?

In a certain code language, "TERMITE" is written as "UDSLJSF". How is "MINISTER" written in that code language?

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then
76 x 4 + 4 – 12 ÷ 37 = ?