$\left(+3\right)\left(+4\right)\left(+5\right)$

$19^2y^2$

$\left(3^7\right)^4$

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

$15a^3-24ab^3+10a^2b-16b^4$

$\frac{8}{7}a^2-\frac{3}{10}a^3b+\frac{1}{4}a^2+\frac{2}{5}a^3b$

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