$3x^2+2x-1=0$
$2a+6b-5a-14b-2$
$\left(x^2.x\right).e\frac{1}{x-4}$
$\int\frac{1}{x\sqrt{x^4-9}}dx$
$\left(\frac{3}{5}x+\frac{1}{2}\right)\left(\frac{3}{5}x-\frac{1}{2}\right)$
$\int_0^{\pi}\left(t\cos\left(nt\right)\right)dt$
$0<\frac{9x^2+12x+4}{4}$
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