$21x^6-62x^4-73^2=0$

$(52x+7)^2=0$

-5 =9$x$+5𝑥-𝑥²

72𝑥³=9

$9^{x^2-5}=10$

$7x^{100-98}=5$

$121𝑥^2−\frac{33}{100}𝑥=5$

$31x^3=5x^2+𝑥$ 

$66x^2=(2x)^3−5$

$15𝑥^{5−2}+6x-9=21$

$y$ =144$x$+12

5𝑥²+10𝑥=-2

$5623x^{4-2}-6738x^{-2-5}=6582x^{-9+7}$

$4543x^{-2+4}-565x^{3-1}=434x^{-21+23}$

$\frac{x^3}{x}−21𝑥+10=5$ 

$15𝑥^{5−2}−31𝑥=6$ 

9𝑥$=$ 5$+$ 12𝑥

$21𝑥^2−31𝑥=6𝑥^2$

$\frac{15𝑥^5}{5𝑥^3}=𝑥−5$

$\ \frac{21𝑥^3}{3𝑥^2}−21𝑥+10=5$