$-3+4-8+2+4$
$x^2-9>0$
$-2+5x^3+3y^2+4x-7+3-5x^3$
$25ab^2c^2+35abc$
$\left(-4u^2-8uv+2v^2\right)\left(-8u^2+5uv+10v^2\right)$
$\int_1^4\left(4-2t+3t^2\right)dx$
$\frac{1}{1-\sen^{2}\theta}=1+\tan^{2}\theta$
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