$\left(-3\right).\left(-4\right).\left(-5\right).\left(5\right)\left(-1\right)\:$
$\lim_{x\to\frac{\pi}{2}}\left(\cos\left(x-\frac{\pi}{2}\right)\right)^{\frac{1}{x}}$
$3x^{-1}+3x^3$
$2\int\left(\frac{sinx}{\sqrt{cosx}}\right)dx$
$2\sin2x=0$
$-3\left(0\right)^2+3\left(0\right)+2$
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