$0.25-8y^2+64y^4$
$\left(-x+5\right)\left(x+3\right)$
$\left(2sin^22t\right)dx+cosx\left(1+cos2x\right)dt$
$6.28\cdot0.5$
$60\cdot\left(-3\right)$
$18x^2+8x-9x^2+10$
$\tan^2x-\cot^2y=\sec^2y-\csc^2y$
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