Coding and Decoding Questions

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then

12 V 3 M 441 L 21 S 8 = ?

If 40@8 = -5, 30@3 = -10 and 20@5 = -4, then find the value of 60@3 = ?

In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.

9 - 18 + 35 x 10 ÷ 30 = ?

If 10$25 = 8, 12$25 = 10 then what is the value of 14$53 = ?

In the following question, by using which mathematical operators will the expression become correct?
27 ? 9 ? 18 ? 24 ? 12

In a certain code language, “RINKS” is written as “SKOMT”. How is “FRIED” written in that code language?

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then

5 V 9 M 63 L 9 S 7 = ?

If "*" denotes "added to", "&" denotes "divided by", "@" denotes "multiplied by" and "%" denotes "subtracted from", then 135 & 15 @ 10 % 3 * 6 = ?