$2x+3\ge1$
$x^2+y^2-7=0$
$\int\frac{\left(4x+3\right)}{4x^4+8x^3+3x^2}dx$
$4x^2y\left(3x-2x^3y+y^4\right)$
$\left(x+3\right)^2-\left(x-4\right)^2-\left(x-3\right)^2+\left(x-4\right)^2$
$cos\left(5x\right)-cos\left(3x\right)=-2cos\left(x\right)sen\left(4x\right)$
$9x^2+30ax+25a^2$
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