$\frac{1}{1-\sin\left(x\right)}=\frac{1}{1+\sin\:\left(x\right)}$
$n^2-2n+2$
$\int\left(\frac{2x}{\left(x^2+2\right)}\right)dx$
$5tan\left(3-\frac{\pi}{3}\right)$
$\left(\left(x+4y\right)^{\frac{1}{5}}\right)^3$
$\left(4x^5+3x^8\right)^2$
$7+10\cdot45$
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