prove by induction \sum_{k=1}^nk^3=(n^2(n+1)^2)/4

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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

☐²

x^☐

√☐

^□√☐

□□

log_□

θ

∞

∫

ddx

≥	≤	·	÷	`x`^◦	(☐)	\|☐\|	(`f` ◦ `g`)	`f`(`x`)	ln	`e`^☐
(☐)^′	∂∂`x`	∫_□^□	lim	∑	sin	cos	tan	cot	csc	sec

simplify solve for inverse tangent line

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prove ∑_k=1ⁿk³=n²(n+1)²4

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Prove by induction ∑ _k=1ⁿk³=n²(n+1)²4

Check for n=1: True

Assume for n=m: ∑_k=1^mk³=m²(m+1)²4

Prove for n=m+1: True

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

prove by induction \sum_{k=1}^nk^3=(n^2(n+1)^2)/4

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