$-386+2009$
$\frac{4x^2}{x^4+4}$
$\int_{\frac{5\pi}{2}}^0cosx\:dx$
$\frac{1}{2}\int_0^{\pi}\left(1+cos\theta\right)^2d\theta\:$
$\left(a+3\right)\left(a+1\right)\:$
$\left(3m^2n^3\right)\left(2mn^4\right)^2$
$\frac{c}{a}+\frac{d}{a},\:a=2,\:b=4,\:c=3,\:d\:=-25$
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