$\left(4x-12y\right)\left(4x+12y\right)$
$\ln\left(1-x\right)=5$
$\int-\frac{2}{\sqrt{-5x-4}}dx$
$\left(sin\left(x\right)-\cos\left(x\right)\right)^2+\left(\sin\left(x\right)+\cos\left(x\right)\right)^2=2$
$x^2+7x+7=66-x$
$\int e^x\sqrt{1+e^{2x}}\:dx$
$\lim_{h\to0}\left(\frac{\left(\frac{1}{\sqrt{x+h-4}}-\frac{1}{\sqrt{x-4}}\right)}{h}\right)$
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