$sin^2x+sinx-2$
$545\cdot856$
$\int x^34^{x^4}dx$
$\int\frac{x^2}{x^4+x^2}dx$
$2+x<\frac{z}{9-x^{5}}$
$7xy\cdot5x^2y^3z$
$87\cdot8$
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