$3+2x\le7$
$2cos\left(x\right)-3cos\left(x\right)=2$
$16a^4-121b^2$
$9xy+6x^2y-4xy-2xz+3x^2y$
$-2\cos\left(x\right)=\sin\left(2x\right)-\cos\left(x\right)$
$\int8e^{9x}dx$
$3^2-5$
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