This page exposes the results of running answer tests on STACK test cases. This page is automatically generated from the STACK unit tests and is designed to show question authors what answer tests actually do. This includes cases where answer tests currentl fail, which gives a negative expected mark. Comments and further test cases are very welcome.

## AlgEquivNouns

Test
?
Student response
Opt
Mark
AlgEquivNouns
1/0
1
-1 ATAlgEquivNouns_STACKERROR_SAns.
TEST_FAILED
AlgEquivNouns
1
1/0
-1 ATAlgEquivNouns_STACKERROR_TAns.
TEST_FAILED
AlgEquivNouns
(x-1)^2
-1 ATAlgEquivNounsTEST_FAILED-Empty SA.
AlgEquivNouns
x^2
-1 ATAlgEquivNounsTEST_FAILED-Empty TA.
AlgEquivNouns
x-1)^2
(x-1)^2
-1 ATAlgEquivNounsTEST_FAILED-Empty SA.
AlgEquivNouns
diff(x^2,x)
2*x
1
AlgEquivNouns
diff(x^2,x)
'diff(x^2,x)
0
AlgEquivNouns
diff(x^2,x)
'diff(x^2,x)
0
AlgEquivNouns
'diff(y,x)
noundiff(y,x)
1
AlgEquivNouns
diff(y,x)
0
1
AlgEquivNouns
'diff(y,x)
0
0
AlgEquivNouns
noundiff(y,x)
0
0
AlgEquivNouns
diff(y(x),x)
0
0
AlgEquivNouns
'diff(y,x,1)
'diff(y,x,2)
0
AlgEquivNouns
'diff(y(x),x)
'diff(y,x)
0
AlgEquivNouns
subst(y,y(x),'diff(y,x)+y
=1)
'diff(y,x)+y=1
1 ATEquation_sides
AlgEquivNouns
subst(y,y(x),'diff(y(x),x
)+y(x)=1)
'diff(y,x)+y=1
1 ATEquation_sides
AlgEquivNouns
subst(y(x),y,'diff(y,x)+y
=1)
'diff(y(x),x)+y(x)=1
1 ATEquation_sides
AlgEquivNouns
subst(y(x),y,'diff(y,x)+y
=1)
'diff(y,x)+y=1
0 ATEquation_default
AlgEquivNouns
subst(y(x),y,'diff(y(x),x
)+y(x)=1)
'diff(y,x)+y=1
-1 ATAlgEquivNouns_STACKERROR_SAns.
TEST_FAILED
AlgEquivNouns
y_x
'diff(y,x)
0
Partials
AlgEquivNouns
noundiff(f,x,1,y,1)
noundiff(noundiff(f,x),y)
1
AlgEquivNouns
noundiff(noundiff(f,y),x)
noundiff(noundiff(f,x),y)
1
AlgEquivNouns
noundiff(noundiff(f,x),x)
noundiff(f,x,2)
1
Differential equations
AlgEquivNouns
noundiff(H,x,2) = -R/T
noundiff(H,x,2) + R/T = 0
1 ATEquation_ratio
AlgEquivNouns
'diff(H,x,2) = -R/T
noundiff(H,x,2) + R/T = 0
1 ATEquation_ratio
AlgEquivNouns
y(t)=int(s^2,s,0,t)
y(t)=t^3/3
1 ATEquation_sides
AlgEquivNouns
y(t)='int(s^2,s,0,t)
y(t)=t^3/3
0 ATEquation_lhs_notrhs
AlgEquivNouns
y(t)='int(s^2,s,0,t)
y(t)=nounint(s^2,s,0,t)
1 ATEquation_sides
Logic nouns are still evaluated
AlgEquivNouns
true nounand false
false
1 ATLogic_True.