$-7\cdot4\cdot8$
$8x+12x^2-4x^3$
$\frac{x}{2}+4>1$
$\csc^2\left(x\right)-\tan\left(x\right)$
$13^4$
$\frac{1+\frac{sen\:x}{cos\:x}}{1+\frac{cos\:x}{sen\:x}}$
$\int vdv$
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