$\lim_{x\to0}\left(\frac{e^{tb}-e^{ta}}{x\left(b-a\right)}\right)$
$3\csc\left(x\right)\tan\left(x\right)+3\sec\left(x\right)$
$\left(bx-cy\right)^3$
$2+10+14$
$x^2\left(2x-1\right)^2$
$20+90+515$
$\sqrt{x}^2+1\:-x$
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