$49x^5-9x^3-15x$
$\lim_{x\to\infty}\left(\sqrt{\left(x^2+2x\right)}-\left(2\sqrt{\left(x^2+x\right)}\right)+x\right)x$
$8sinxcos^3x-2sin\left(2x\right)=sin\left(4x\right)$
$\left(0.0064\cdot\left(54\cdot1.515151515\right)^{-2}\right)^{-1}$
$\frac{b^{24}}{b^{11}}$
$5n\:-5n$
$12x-9\le1+3x$
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