Modern Arabic mathematical notation

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Modern Arabic mathematical notation is a mathematical notation that is based on the Arabic script. Its form is mostly derived from western notation, but has some notable features that set it apart from its western counterpart. The most remarkable of those features is the fact that it is written from right to left following the normal direction of the Arabic script. Other differences include the replacement of the Latin alphabet letters for symbols with Arabic letters and also the resort to Arabized names for functions and relations. It also exhibits one of the very few remaining vestiges of non-dotted Arabic scripts as dots over letters are omitted most of the time when using the notation.
Letter cursivity (connectedness) of Arabic is also taken advantage of, in a few cases, to define variables using more than one letter. The most widespread example of this kind of usage is the canonical symbol for the radius of a circle نق (usually pronounced naq /nɑq/) which is written using the two letters nūn and qāf. When variable names come next to each other (as when expressing multiplication) they are written non-cursively.
The notation differs slightly from region to another. In university level education most regions use the western notation.
The following table illustrates some common function names and symbols.

Latin	Arabic¹	Note
$x$	س	Usually written in ruq'a form
$y$	ص
$z$	ع
$a$	أ
$b$	ب
$c$	ج
$n$	ن	Sometimes written without the upper dot
$i$	ت	Only when $i$ stands for $\sqrt{-1}$
$e$	هـ	Only when $e$ stands for the base of the natural logharithm.
$sin$	جا	Can also be written as حا ,However the lower dot is always articulated when vocalized. Also جب in some regions e.g. Syria.
$cos$	جتا	Dots can be omitted. Also تجب in some regions e.g. Syria.
$tan$	ظا	Dot can be omitted. Also ظل in some regions e.g. Syria.
$cot$	ظتا	Dot can be omitted. Also تظل in some regions e.g. Syria.
$sec$	قا	Dots can be omitted.
$csc$	قتا	Dots can be omitted.
$\lim$	نهــا	Dot can be omitted
$Σ$	مجــــ	Dot can be omitted. Used only when $Σ$ means summation. Also written as in some regions.
$\frac{dy}{dx}$
$f$	د	As in $f (x)$
$\int$
$π$	ط