$8<4+y$
$\sec\left(a\right)-\cos\left(a\right)=\tan\left(a\right)\cdot\sin\left(a\right)$
$\int2e^{-0.1x}dx$
$0786\cdot92$
$4x^2-8x-12$
$\int\frac{\left(1+z^2\right)^2}{z^2}\cdot dz$
$7a^2-15b^35b^3+9a^2-4b^3$
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