Math rebuses

[daon2]

These are probably too transparent, but I tried!

\(\displaystyle \dfrac{\text{DUC PROOFBY TION}}{ \text{N}}\)

\(\displaystyle \text{CREA } \color{tan}{\text{GENT}} > 0 \text{=>SES}\)

\(\displaystyle \text{YOU}_{\text{STI}} \begin{array} \, \text{TION}\\ \text{TION}\end{array}\)

 

[soroban]

Hello, daon2!

I like them!

\(\displaystyle \dfrac{\text{DUC PROOFBY TION}}{\text{N}}\)

**
Proof by induction over n
PROOFBY in DUCTION over N
**

\(\displaystyle \text{CREA } \color{tan}{\text{GENT}} > 0 \text{=>SES}\)

**
Positive tangent implies increases.
(tan GENT > 0 implies) in CREASES.
**

\(\displaystyle \text{YOU}_{\text{STI}} \begin{array} \, \text{TION}\\ \text{TION}\end{array}\)

**
u-substitutions
YOU-sub-STI two TIONs
**

 

[Nehushtan]

Try this:

sin ×​

:cool:

 

[Nehushtan]

[FONT="Times New Roman]Well, the answer isn’t math-related, but the statement of the puzzle is kind of math-related. [/FONT]

 

[soroban]

Hello, Nehushtan!

sin ×

** Sign of the times (SINE of the TIMES) **

 

[Nehushtan]

Well, the answer I was looking for was

sign of the cross​

but soroban’s answer is also acceptable.

Well done!

 

[soroban]

A few more groaners



\(\displaystyle HIOAg\)

** call of the Lone Ranger **



\(\displaystyle \text{(armed)}^T\)

** armed to the teeth **




\(\displaystyle \begin{array}{ccccc} Fe^{^{++}} \\ Fe^{^{++}} \quad Fe^{^{++}} \\ Fe^{^{++}}\qquad\qquad Fe^{^{++}} \\ Fe^{^{++}} \qquad\qquad Fe^{^{++}} \\ Fe^{^{++}} \quad Fe^{^{++}} \\ Fe^{^{++}}\;\; \end{array}\)

** ferrous wheel **