$\lim_{x\to0}\left(\frac{1}{x}-\frac{1}{2e^x-2}\right)$
$\int\frac{2}{\left(x+4\right)\left(x+1\right)^2}dx$
$\left(-14\right)\cdot\left(-6\right)$
$25x^2-30x+8$
$sin\:2x\:-\:sin\:x\:=\:0$
$\int_0^{\frac{\pi\:\:}{5}}\left(\:3\:cos^4x\right)dx$
$\frac{dy}{dx}-3y=.5e^x$
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