$-3y^2+4=2x^2$

$\lim_{x\to0}\left(\frac{3\left(e^x-e^{-x}\right)}{x^1}\right)$

$\int3\left(3x-11\right)^9dx$

$\sin\left(x\right)^2-4\sin\left(x\right)-5=0$

$\int_0^{+\infty}\left(\frac{1}{\left(1+x^2\right)^2}\right)dx$

$50+-29+\left(-21\right)+3f$

$\left(3s^5+8t^{12}\right)\left(3s^5-8t^{12}\right)$