$4cosx-1=2sinxtanx$
$\int x ^ { 4 } ( x ^ { 3 } + 8 x ^ { 2 } + 7 ) d x$
$\left(-3\right)x\left(-5\right)x\left(-2\right)x\left(-1\right)$
$\left(x^2-26x\right)=-394$
$5cd^2+10c^2d-15cd$
$5y^2-8y=2$
$\left(4n+1\right)^3$
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