y = (tg³2x) / (tg(5x + 1))
(u/v)`=(u`·v–u·v`)/v2
u=tg32x
v=lg(5x+1)
y`=(3tg22x·(tg2x)`·lg(5x+1)–(tg32x)(1/(5x+1)ln10)·(5x+1)`)/lg2(5x+1)
y`=(3tg22x·(1/cos22x)·(2x)`·lg(5x+1)–(5·tg32x)/((ln10)·(5x+1)))/lg2(5x+1)
y`=(6(tg22x)·lg(5x+1)/(cos22x)–(5·tg32x)/((ln10)·(5x+1)))/lg2(5x+1)