$\frac{d}{dx}y=u^2-9.u=x^2+1$
$\left(4\right)\left(-11\right)\left(-3\right)$
$\left(6x^5\right)^2$
$3-6sin^2\left(x\right)=0$
$\lim x\to\pi\left(\frac{\left(sin2x\right)^2}{1-cos2x}\right)$
$54x^3-16$
$\frac{1+\frac{1}{cos\:\theta\:}}{\frac{1}{sin\theta\:}}-\frac{sin\:\theta\:}{cos\theta\:}$
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