$\lim_{x\to0}\left(\frac{sinx^4}{x^4}\right)$
$\int4x\left(2x^2-1\right)^5dx$
$\int\frac{\sqrt{x^2+9}}{3x}dx$
$3\tan^2x+5\tan x=2$
$\frac{d}{dx}x^{2lnx}$
$-3\:-\:\left(-2\right)\:+\:\left(-1\right)\:+\:8\:+\:\left(-11\right)$
$-9\:-\:\left(-14\right)-\left(-20\right)$
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