$\left(1-\left(\sin\left(x\right)\cdot\sin\left(x\right)\right)\right)\left(1+\left(\tan\left(x\right)\cdot\tan\left(x\right)\right)\right)$
$30y^2+80y+50$
$5a-17^2+2a+4$
$\int7x^6\left(x^7-3\right)dx$
$\int\left(4x-7\right)\cdot ln\left(2x\right)dx$
$-5.4\:-7.8x=-78.408$
$3x^2+6x-y=48$
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