$x^4+x-18$
$-\infty\left(e^{-2\left(-\infty\right)}\right)$
$5x^2+15x+1=0$
$\int\frac{x}{x\left(x-1\right)-1}dx$
$1.75\cdot5$
$\left(1+\tan\left(a\right)\right)^2+\left(1-\tan\left(a\right)\right)^2=2\sec^2\left(a\right)$
$3\left(4k+20k^2+25k^3\right)$
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