$4^x-\frac{3}{4^x}=8$
$\frac{dx}{dt}=tx+\left(1-t\right)x=e^{2t}$
$\left(4x+2xy\right)^3$
$y+xy'=4x^3$
$1^9$
$x^214x<0$
$7\left(2\right)^2$
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