Coding and Decoding Questions

In a certain code language, "ARMS" is written as "5467" and "LIAR" is written as "1254". How is "SMALL" written in that code language?

If "K" means "subtracted from", "L" means "divided by", "M" means "added to" and "D" means "multiplied by", then 96 L 4 K 6 M 11 D 9= ?

In a certain code language, “PRICE” is written as “GEKTR”. How is “VALUE” written in that code language?

In a certain code language, "STUBBORN" is written as "VUTAAOSP". How is "SHIPPING" written in that code language?

In a certain code language, "TOAST" is written as "03210" and "RIGID" is written as "45759". How is "DOOR" written in that code language?

If '/' denotes 'subtraction', '-' denotes 'addition', '+' denotes 'multiplication' and 'x' denotes 'division', which of the following is the value of the expression

182/91x7+3-1

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_qr_srq_p_rs_r_p

If in a language RAT is coded as "@$&" and HEAD is coded as "%*$#" then THREAD is coded as what ?