$\int\:\frac{3x^4\:}{5\:}dx$

$\int2\sec\left(7x\right)dx$

$f\left(x\right)=8\cos^2\left(x\right)-8\sin^2\left(x\right)$

$\left(\frac{1}{2}x^2+\frac{1}{3}xy\right)-\left(-\frac{1}{2}x^2-\frac{1}{3}xy\right)$

$\cos\cdot\tan+1-\cos=\sin$

$\left(\sqrt{2m^2n}\right)\left(\sqrt{2a^2m^3}\right)$

$-a+2c-5a-2c+7-4c$