$2x^2+2y^2-4x-20y+40=0$

$5^{2^{17^{0^{13}}}}$

$\int x^2\left(x^3-3\right)^8dx$

$\frac{\left(\sin\left(x\right)-\cos\left(x\right)\tan\left(x\right)\right)}{\cos\left(x\right)}=\tan^2\left(x\right)-\tan\left(x\right)$

$\left(a-3\right)\left(a^2+3a+4\right)-\left(-a-3\right)^2$

$2x^2-x+3=0$

$6a+7b-5a+8b$