$\int\frac{x-1}{81x^4-1}dx$
$\lim_{x\to0}\left(1\:+\frac{2}{n}\right)^{2n}$
$25m^4-40m^2n^3+16n^6$
$\log_m\left(a^3\right)=\frac{3}{2}$
$\int\frac{x^4+2}{x^3-x^2}dx$
$-\frac{1}{3}\sqrt{-1800}$
$2+\sqrt{3x+1}=x$
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