$-15-\left(20-10\right)+\left(-8-4\right)$
$sen\left(90-x\right)$
$\left(m^6n^3\right)^2$
$\int\left(\frac{1}{2x^3}\right)dx$
$\left(y^2-1\right)\left(y^2-3\right)$
$sin^32x\:=\:\left(0.5\:sin\:2x\right)\left(1\:-\:cos\:4x\right)$
$24cos^25x-12$
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