$\int\:\frac{tanz}{cos2}\:dz$
$4x^2-3x-1$
$\sqrt{1}9$
$\int\frac{x^3+2}{2x^5-8x}dx$
$2sin+4=3$
$\left(-2\right).\left(5.\right).\left(-3\right).\left(-5\right)\left(-6\right)$
$\left(2f^2+g\right)^2$
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