$\frac { x ^ { 5 } y ^ { - 4 } } { x y ^ { - 1 } }$
$3x\:+\:10\:=\:2x\:+14\:$
$-0.05x^2+2.5x+4.5$
$21z\:+\:2a\:-\:18z\:+\:4\:=\:$
$\frac{cos^4x-sin^4x}{1-2sin^2x}$
$\int_{-\infty}^{-1}\left(\frac{1}{2-w}\right)dw$
$x^2y+2y=5x$
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