$128\cdot6$
$\int\sec^5\left(2x\right)dx$
$b^2-30b=8$
$\lim_{x\to\infty}\left(\frac{\ln\left(1+2e^{-x}\right)}{\ln\left(1+e^{-x}\right)}\right)$
$7xy+8xy-2xy$
$\int\left(3x^{4}-5\right)^{4}\left(12x^{2}\right)dx$
$\frac{21x^3+14x^2}{7x}$
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