Coding and Decoding Questions

If 1∆-5=5, 4∆7=-28 and -1∆-3=-3, then find the value of 8∆-8 =?

If 37*14 = 17,
69*33 = 34,
91*125 = 72
then what should 28*56 = ?

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?

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

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

If 9 $ 4 = 17 and 1 $ 5 = 10, then 3 $ 6 = ?

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

In a certain code language, "REMINDER" is written as "SFNJMCDQ". How is "STANDARD" written in that code language?