$\frac{1}{sec\:x\cdot tan\:x\:}=csc\:x-sin\:x$
$4x^6+16x^4+256x^2+1024$
$2000\left(1+0.2^{18}\right)$
$\int\frac{x-7}{\left(\left(x-5\right)^2\left(x-9\right)\right)}dx$
$x^2-3x+8$
$\lim_{x\to-\infty}\left(\frac{t}{\sqrt{16t^2+3}}\right)$
$-12n+2$
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