$7x=49$
$\lim_{x\to\infty}\left(\frac{2x-1}{2x+3}\right)^{2x-1}$
$ln\left(x-6\right)+ln\left(x+6\right)=0$
$\lim_{x\to0}\left(\frac{\sqrt{2x+24}-5}{x^1}\right)$
$121x^6-9y^4$
$x^6-b^9$
$9y+3-4x-2y-3x-52$
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