$senx\:=sen2x$
$\left(3m^2-m\right)\left(3m^2+m\right)$
$\left(3x+41\right)^2$
$16m^3d^2-100$
$\left(7-2+4\right)-\left(2-5+\left(-1\right)\right)$
$12+y+17+z$
$\frac{\cos\left(x\right)}{\sec\left(x\right)}+\frac{\sin\left(x\right)}{\sec\left(x\right)}$
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