$\lim_{x\to0}\left(\frac{-3sin\left(3x^4\right)}{5x}\right)$
$6\sec^2\left(x\right)-8=0$
$2tan\left(x\right)cos\left(x\right)=sin\left(2x\right)$
$9x^2-18x-16$
$\log_{11}\left(11^{23}\right)$
$3-2+6-\left(-8\right)$
$-0.75x^3+0x^2+9x-15$
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