$6\left(b+74\right)=-18$
$x^3-8x^2+11x+20$
$x^2+9x-2$
$x^5-5x+4$
$\lim_{x\to0}\left(\frac{\sin^4\left(3x\right)}{x^2\tan^2\left(3x\right)}\right)$
$\ln\left(\cosh\left(8x\right)-\sinh\left(8x\right)\right)$
$\lim_{x\to0}\left(1+sin4x\right)$
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