$x^2y^4-49$
$sen\:x\:.\:cos\:x-1=0$
$\left(-13n^4+12n^3-3+8n^2\right)+\left(-11n^2-n^3\right)$
$\sqrt[6]{c^{16}}b^8$
$-9+36-5-15-23+15-36$
$\frac{7t}{3}=21$
$\left(x+y\right)^2+6\left(x+y\right)\:+9$
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