$10+20+4\cdot6-15$
$tna\left(x\right)\cdot cos\left(x\right)=sen\left(x\right)$
$\frac{x}{2}\cdot\frac{sin\left(x\right)}{1-cos\left(x\right)}$
$9n^2-24n+16$
$v^2-12v$
$\int\left(x^5\right)\left(4x^3+5\right)dx$
$17\:-\:\left(-\:4\right)\:.\:5\:+\:18\::\:\left(-\:9\right)\:-\:18\:$
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