$4\left(y-7x\right)-y$
$3x^3+\frac{15}{2}x^2+\frac{3}{2}x-3$
$t9\:en\:a^{16}-1+a+1$
$\left(-\frac{1}{2}x^2y^3+3xy+4\right)\left(-x^2y^3\right)$
$4cos^20-3sin^20$
$cosx\:=\:-1$
$5x+10>12x-4$
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