$2x^2+12x-20=0$

$\left(-4\right)^8:\left(-4\right)^5$

$\left(4\right)^2-4\left(-8\right)\left(6\right)$

$\int_0^a\left(x\ln\left(x\right)\right)dx$

$\int\left(\frac{1}{\left(sqrt\left(x^2-3\right)\right)}\right)dx$

$\left(sin\:\left(x\right)+cos\:\left(x\right)\right)\left(sin\left(x\right)-cos\:\left(x\right)\right)-2sin^2\:\left(x\right)$

$\sec\left(x\right)-2=0$