$5x^2-40x+5=0$
$9x\:+\:10x\:-3x\:+\:7x$
$csc\:\left(a\right)+cot\left(a\right)=\:\frac{sen\left(a\right)}{1-cos\:\left(a\right)}$
$\left(-57-67\right)\cdot\left(85-14\right)$
$6x^4-15y^3$
$\int\cos\left(ln\left(x\right)\right)dx$
$6x+9\ge-2x+5$
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