$${ 7 }^{ 2 } \times { 7 }^{ 2 } x { 5 }^{ 2 } \times { 7 }^{ 2 } =$$
$2941225x$
$$7^{4}x\times 5^{2}\times 7^{2}$$
$$7^{6}x\times 5^{2}$$
$$117649x\times 5^{2}$$
$$117649x\times 25$$
$$2941225x$$
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$2941225$
$$\frac{\mathrm{d}}{\mathrm{d}x}(7^{4}x\times 5^{2}\times 7^{2})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(7^{6}x\times 5^{2})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(117649x\times 5^{2})$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(117649x\times 25)$$
$$\frac{\mathrm{d}}{\mathrm{d}x}(2941225x)$$
$$2941225x^{1-1}$$
$$2941225x^{0}$$
$$2941225\times 1$$
$$2941225$$
