WebAssign - Converting Text to PNG images

Converting Text to PNG images

Below are some example of how you can convert text expressions into an image to use within an assignment. Quotes are shown only to emphasize the spacing required for pre-subscripts and pre-superscripts. They are not required to be entered in the expression field.

Fractions

Fraction	'x/y'
Bevelled fraction	'1\/2'	$1\/2$

Subscripts and Superscripts

Superscript	'x^2' or 'x**2'
Subscript	'x_2'
Pre-Superscript	' ^2x'
Uranium isotope	' ^235U'
Pre-Subscript	' _2x'
Pre-Super/Subscript ^†	' _x^2B'

† It is not yet possible to have a prescript followed by both a superscript and subscript.

Operators and mathematical symbols

Infinity	'infinity'
Middot	'x middot y'
Cross	'x cross y'
Proportional To	'x propto y' or 'x proportional y'
Approximately Equal	'x ~= y'
Not Approximately Equal	'x !~= y'
Union	'x union y'
Intersect	'x intersect y'
Perpendicular	'x perp y'
Less than or equal to	'<='
Greater than or equal to	'>='
Not equal to	'!='
Plus or minus	'+/-'
Square root	'sqrt(x)'
N root	'root3(x)', 'root4(x)', ... 'rootn(x)'
Absolute value	'abs(x)'
Limit	'lim_(x->0)'
Integral	'int_0^x'
Closed Integral	'cintegral'
Summation	'sum_(i=0)^x'
Under/Over	'sum__(i=0)^^infinity'
Product	'prod_(i=0)^x'
Differentiation	'(difff(x))/(diffx)'
Partial derivative	'(partial^2u)/(partialx^2)'
Trig ^†	'cos(x)', 'arctan(y)', etc.	,

† Hyperbolic functions do not seem to be supported by LaTeX.

Greek characters and text

Text	'text(a string of text)'
Greek	'alpha', 'beta', 'delta', 'pi', etc...	, , ,
Capital greek	'Omega', 'Theta', 'Lambda', etc...	, ,

Matricies and Formulas

Formula	'f(x)={(2x+1 text(if) x <= -1,3x text(if) -1 < x < 1,6x-1 text(if) x >= 1)'
Quadratic formula	'x=(-b+/-sqrt(b^2-4ac))/(2a)'
Matrix	'matrix(2,3,[x,y,z,a,b,c])'
Matrix	'matrix(4,4,[a_(11),a_(12),...,a_(1n),a_(21),a_(22),...,a_(2n), _...,_...,\...,_...,a_(m1),a_(m2),...,a_(mn)])'	$matrix(4,4,[a_(11),a_(12),...,a_(1n),a_(21),a_(22),...,a_(2n), _...,_...,\...,_...,a_(m1),a_(m2),...,a_(mn)])$

Other useful symbols

Degree	'36 deg'
Under	'(H_2O)__-->'
Over	'(H_2O)^^-->'
Hat	'x^^\\^'	$x^^\^$
Vector	'x^^\\->'	$x^^\->$
Accent	'x^^\\''	$x^^\'$
Tilde	'x^^\\~'	$x^^\~$
Grave	'x^^\\`'	$x^^\`$
ell	'ell'
hbar	'hbar'
Overbar	'x^^\\_'	$x^^\_$
Overbrace	'(x+y+z)^^\\}'	$(x+y+z)^^\}$
Underline	'x__\\__'	$x__\__$
Underbrace	'(x+y+z)__\\_}'	$(x+y+z)__\_}$
Left angle	'langle'
Right angle	'rangle'
Right arrow	'->'
Long right arrow	'-->'
Left arrow	'<-'
Long left arrow	'<--'
Left/Right arrow	'<->'
Right harpoon	'~>'
Left harpoon	'<~'
Left/Right harpoon	'<~>'
Double right arrow	'==>'
Double left arrow	'<=='
Double left/right arrow	'<=>'
Ellipsis	'...'
Vertical ellipsis	'_...'
Diagonal ellipsis	'\...'	$\...$
Bold	'<b>x</b> + y'

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