$-5\left(cot^2x\:-\:csc^2x\right)\:=\:5$
$5a\sqrt[3]{160x^7y^9u^{13}}$
$\left(4\right)\left(4\right)\cdot\left(-2\right)\left(-2\right)$
$x^3y^2+xy^3+2x^2y^3$
$49x^4-42x^2y+9y^2$
$2\cdot128$
$-31\:-3,09$
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