$\left(sen\:v\:-\:cos\:v\right)^2$
$\sin\left(u\right)\csc\left(u\right)-\cos^2\left(u\right)$
$7,5\cdot5$
$8x^2+10x+3$
$\frac{-20}{10}$
$5x^3-4x^2+2x-3-3x^2+2x^2+x-1$
$x^2+3x-39$
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