$\lim_{x\to0}\frac{\sqrt{x+1}-1}{\sqrt{x+4}-2}$
$\int\frac{a^{2x}-1}{\sqrt{a^{x}}}dx$
$\left(3x^3\right)^2$
$0^3+5^2+\left(-1\right)$
$\left(a^2-a+1\right)\left(a+1+a^2\right)$
$3cos\left(5x+80\right)-8$
$5t-8=2t-2$
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